PNB Chapter 149 Show off your skills!
Chapter 149 Show off your skills!
Ye Kun chuckled: "Forget it, if you don't want it, I'll make some other arrangements."
To be on the safe side, Ye Kun first asked Tan Bamao to check these eunuchs to prevent any fake eunuchs from sneaking in.
Tan Bamao smiled and checked it carefully to confirm that there was no problem.
Ye Kun nodded, asked several eunuchs about their educational level, and then called Lao He over.
Old He's name is He Taishui. He followed Ye Kun to Pingye County and was very happy. He clasped his fists and asked, "Master Ye, what can I do for you?"
"In the future, you will be my teacher, specializing in mathematics, and teach these eunuchs by the way. Then, let them keep accounts for me, or be my teacher or something."
Lao He was a little surprised and said with a wry smile:
"Teaching math is no problem, but I feel guilty that I can't work for Master Ye and ask Master Ye to support my family."
"Teaching is helping me do things."
Ye Kun brought Lao He and several eunuchs to the school next door to teach them Arabic numerals and the concepts of fractions, decimals, and negative numbers.
Lao He is indeed a mathematician. He understands it immediately after hearing it and can apply it to other situations.
The five eunuchs were no match for him and looked confused.
Seeing that Lao He was very receptive, Ye Kun did not hesitate to take out his homemade triangle ruler and protractor and introduce Lao He to the basic knowledge of geometry, as well as various formulas for calculating area and volume.
Lao He listened very carefully, was overjoyed, and admired Ye Kun even more:
"Master Ye, your use of numbers like this is much simpler and easier to understand at a glance."
At this time, the Da Ding Kingdom also had basic knowledge of mathematics and geometry, but the expression was very complicated.
Using Arabic numerals is much more intuitive.
Ye Kun smiled and said, "That's all for today. Lao He, you should first understand everything on the blackboard. I will teach you new things when I have time."
Old He grabbed Ye Kun's sleeve and said, "Master Ye, how do you calculate the area of a sphere?"
Ye Kun smiled, wrote down the formula for the area of a sphere, and explained the meaning of a few letters: "This is the formula for calculating the area of a sphere. I will teach you how to cut a circle, and you can verify it yourself later."
The circle-cutting method was not complicated, and Old He understood it right away. He bowed down to Ye Kun and said, "Master Ye is a man of great learning. I'm afraid I'll never be able to catch up with him in my lifetime."
"Let's study together."
Ye Kun patted Lao He on the shoulder and said, "I am very happy to meet you. From now on, I will rely on you for math teaching."
Old He nodded repeatedly and said, "Master Ye, take Tiantian back and let her serve you. Although the girl is stupid, she is quite obedient and can learn the rules slowly."
"No, Tiantian can read, so let her be a teacher in the future. By the way, Tiantian is too thin, let her eat more meat in the future, she will be more beautiful."
Ye Kun waved his hand and went back to rest.
Old He didn't leave yet. He stared at the blackboard in a daze, sometimes frowning in thought, sometimes grinning foolishly.
Ye Kun returned to North Street and chatted with Yuejuan and Yourong.
Jiang Yourong moved here after the New Year and she and Yuejuan are as close as sisters, with no barriers between them.
The next morning, Tan Bamao asked for a meeting and reported to Ye Kun: "Godfather, the stone mill you asked the stonemason to make has been completed and is outside the door."
"Call it in quickly and install it in the backyard."
Ye Kun was overjoyed.
The Dading State also had stone mills, but the design of the grinding teeth was radial, which was not very scientific and slow in feeding materials.
Ye Kun recalled the stone mills of later generations, restored the oblique grinding teeth, and asked the stonemasons to process and debug them.
With ideas and a rough blueprint, the craftsmen can quickly figure it out.
Several craftsmen carried the millstone and wooden frame to the backyard and began to install them.
Ye Kun took wheat and corn to test the effect.
At that time there was wheat, but no flour, so everyone ate wheat kernel rice directly, including the skin.
After the stonemasons made the stone mill, they also tested it and found the results were very good.
When tested on the spot, one hundred kilograms of wheat were pulled through in about ten minutes, and the flour came down quickly.
"Very good!" Ye Kun was very satisfied and said:
"Grind the wheat flour again, then sift out the fine flour, and continue grinding the rest, and sift it again, until all that is sifted out is bran. At noon today, all the master stonemasons, don't leave, have lunch here, and I'll treat you to noodles!"
After sifting out the fine flour, Ye Kun went straight to the kitchen and called two cooks to come to work.
Jiang Yourong and Yuejuan also came to help.
Ye Kun added water and kneaded the dough, beating and kneading it on the chopping board, busying himself happily.
The two cooks and Jiang Yourong and Yuejuan also learned to play with dough like Ye Kun.
Ye Kun’s cooking skills are terrible, but he can still make some rolled noodles.
As for knife-cut noodles and ramen, we can only provide ideas and let the chef slowly explore and experiment.
Seeing that the dough was quite chewy, Ye Kun found a straight wooden stick, rolled the dough thinner, cut it into noodles, and cooked a pot to try it out.
With lard and fine salt added to the pot, it tastes of course good!
Jiang Yourong, Yuejuan and others tasted a small bowl each and laughed together: "It turns out that wheat can be eaten this way, not bad, delicious!"
"There are many other ways to eat it. I will teach you slowly later."
Ye Kun smiled and took Jiang Yourong's hand: "Madam, you are pregnant, so don't be too tired or too hard. Let the cook knead the dough."
Jiang Yourong nodded and smiled, happy and sweet.
At noon, several master stonemasons were kept by Ye Kun to eat rolled noodles together.
Lao He was also invited.
Ye Kun thanked the stonemasons and said:
"Everyone continue to make stone mills, stone rollers, mortars and mortar hammers. I have given you the blueprints. You can make bold adjustments based on the actual situation. The ultimate goal is practicality."
The stonemasons all stood up and thanked him: "Master Ye, you are so kind to us. We will definitely work hard!"
"Everyone, please sit down. No need to be polite."
Ye Kun smiled and handed the blueprint to Lao He: "Lao He, look at the stone roller above. One end is big and the other end is small. There are size markings. Do you know how heavy such a roller is?"
Old He was confused again, and said with a wry smile: "Master Ye, this cannot be seen without a large scale."
"It can be calculated." Ye Kun pointed at the drawing:
"I've taught you how to calculate the volume of a truncated cone. First calculate the volume of the stone roller, then multiply it by its specific gravity to get its actual weight. The specific gravity of stone, based on water, is generally between 2.6 and 2.85. Let's take an intermediate value, which is about 2.7. Therefore, the stone roller in the picture weighs about kilograms."
Several old stonemasons also looked at the blueprints and were impressed: "Master Ye is right. A roller like this weighs about 350 kilograms!"
Old He clasped his fists and bowed: "Master Ye is a scholar of heaven, a scholar of heaven!"
"No, no, no, I'm going to teach you some more specific gravity of objects. Remember them, they will be useful in the future."
Ye Kun waved his hand and picked up the brush: "Gold is 19.32 times heavier than water; silver has a specific gravity of 10.6; copper has a specific gravity of 8.7; iron has a specific gravity of 7.8; mercury..."
These things are all junior high school knowledge in the future, ready-made knowledge points.
But the people of Dading Kingdom could not calculate so accurately.
Old He was already stunned by this string of numbers. After a long while, he asked, "Master Ye, how did you calculate this?"
"Just remember these numbers first. They are fixed and will never change. We will tell you how to calculate them later."
Ye Kun picked up the bowl and said, "Come on, everyone, eat more. It's better to work when you are full."
After dinner, the carpenter's workshop delivered another fifty abacuses.
This is a ball abacus from later generations, and it was also considered the most advanced calculator at the time.
Ye Kun took Lao He and went straight to the school, convened the elite class, and started teaching everyone to recognize their own abacus.
Old He was also sitting down listening to the class, as were Wen Axiu, Hongyu, and He Tiantian.
Ye Kun smiled and said:
"My dear students, our ancestors used knotted ropes to record accounts. If we borrowed an egg from your house, we would tie a knot on the rope. Later, we got smarter and invented counting rods, which were small wooden sticks used to count and calculate accounts. So there is a saying that goes, 'strategize in the tent.' If you can't calculate the accounts, you are at a loss."
The classmates all laughed and thought Ye Kun’s talk was interesting.
Ye Kun continued, "Now, we have an abacus in Da Ding country, called a floating bead abacus, with many straight grooves carved on the wood board and small round beads placed in the grooves. But this thing is not easy to use, so I made a graded rolling ball abacus that can be carried with you, and you can count tens, hundreds, thousands, and millions without getting confused..."
Wen Axiu and Liu Hongyu stood up and distributed the abacus to everyone.
Ye Kun called Lao He and continued to explain the abacus. He first taught everyone the addition formula, and then asked Lao He to be responsible for teaching everyone.
Old He is really smart. He uses the abacus to make a crackling sound according to the addition formula.
Ye Kun completed the task, left the school, and went to inspect the military camp.
For several days, Ye Kun was extremely busy.
He handled military and government affairs during the day and often worked overtime at night. Together with Wen Axiu, Liu Hongyu and Lao He, he developed mathematics and geometry teaching materials for the elite classes.
Lao He's eyes originally had a dull look, but now he is becoming more and more energetic and looks radiant!
Ye Kun felt that if he kept Lao He by his side, within a year, this guy would be able to learn advanced mathematics, understand universal gravitation, and calculate the gravitational constant.
The seventeenth day of the first lunar month.
Tianmen County sent an urgent message by flying horse, delivering a secret letter from Shangguan Jifu.
In the letter, Shangguan Jifu said that Liu Dongliang, the governor of Dongba County, had agreed to his request and agreed to Ye Kun's cross-border bandit suppression, and sent 3,000 elite troops to sweep from west to east to cooperate with Ye Kun!
Ye Kun was overjoyed and immediately called a meeting with Qin Erwu, Guan Yong, Zhao Biao and others.
Everyone knew that Ye Kun had taken action, but they didn't know the specific goal.
Ye Kun said: "Brothers, it takes a thousand days to raise an army but only a moment to deploy it. Winter is gone and spring is here. It's time for you and me to show off our skills!"