When I first saw Huang Chengyan, I couldn't help but startle Lu Bu. Damn, is this the beggar from here?

I saw Huang Chengyan's clothes were black and covered with scalded holes, his hair was messy, and his face was so dark that he couldn't tell.

The whole image of an African refugee.

Lu Bu couldn't help but ask speechlessly: "Mr. Chengyan, what are you doing?"

Huang Chengyan ignored Lu Bu's trouble at all, pulled Lu Bu to a pile of finished steel and said to Lu Bu: "Fengxian, look, this is the steel I made based on the materials you provide."

"The proportion of carbon mixed into these steels is different, and the hardness and flexibility of the steel produced are very different. Look, this is the data I recorded."

Then Huang Chengyan pulled Lu Bu to introduce the characteristics of these steels to Lu Bu, and even said that Lu Bu's head was too big. Lu Bu found that he couldn't understand...

Well, a tech madman is worthy of being a tech madman.

I just gave Huang Chengyan a way of thinking, but Huang Chengyan quickly studied it and found that he had made a lot of money to find such talents.

After Huang Chengyan finished speaking a paragraph, Lu Bu quickly interrupted Huang Chengyan and proposed to Huang Chengyan for making molds. Huang Chengyan was indeed very moved.

The concept of mold is definitely a huge innovation and breakthrough in the smelting industry, and it will inevitably change the pattern and current situation of the smelting industry.

Huang Chengyan became very interested in molds. After listening to Lu Bu’s suggestions on mold making and the materials needed for molds, Huang Chengyan immediately devoted himself to the research.

Seeing this situation, Lu Bu couldn't help but shake his head.

This Huang Chengyan is really a workaholic.

However, molds are really important. With molds, you can not only create weapons, but also agricultural tools, etc.

If the agricultural tools are improved and the water conservancy facilities are built, the agricultural output will be greatly improved.

...

After coming out of the steel mill, Lu Bu saw Huang Yueying squatting on the ground, with a thoughtful look on his face.

Seeing Lu Bu come out of it, Huang Yueying jumped up and asked Lu Bu, "Brother Lu, did the centurion leave 241 zhang? Well, it may be a little more than 241 zhang."

Lu Bu looked at Huang Yueying with shock, unable to speak for a long time.

What a monster, it's really a monster!

This question is really too difficult for people of this era, and Lu Bu wondered how Huang Yueying calculated it.

Seeing Lu Bu's surprised look, Huang Yueying asked shyly: "Brother Lu, did he make a mistake?"

Lu Bu shook his head and said, "No, Yueying, tell Brother Lu, how did you calculate it? You can calculate such a difficult question. You are so amazing. Now Brother Lu begins to admire you."

Huang Yueying said shyly: "Brother Lu, actually, this number was actually collected by someone. Can Brother Lu tell me how this question is calculated?"

Lu Bu said happily: "Of course it's OK. Let's go home, I'll tell you the algorithm for this question!"

After saying that, Lu Bu took Huang Yueying's little hand and walked back.

When Lu Bu held his little hand, Huang Yueying was so happy that she was jumping around Lu Bu, as light as a small butterfly.

After returning home, Lu Bu found paper and pen and began to explain the problem-solving ideas to Huang Yueying.

Lu Bu first used a pen to draw the figure on the paper and then marked the numbers on it, but it got stuck when he talked about it.

Huang Yueying looked at the numbers written by Lu Bu and asked, "Brother Lu, what does this mean when you write this curved one?"

Well, Lu Bu really wanted to say that these were Arabic numerals, but the Eastern Han Dynasty had not yet been passed here.

OK, if you want to explain this question, let’s explain the Arabic numerals to this little girl first.

Lu Bu wrote ten Arabic numerals from 0 to 10 on paper, and then said to Huang Yueying: "Yueying, I found that writing Chinese characters is very troublesome when calculating, so I used these ten symbols to replace Chinese characters. You see, this is one, this is two, this is three...this is ten."

Next, Lu Bu explained to Huang Yueying how to write numbers such as ten or even one hundred and ten thousand.

After the explanation was completed, Huang Yueying's eyes lit up and nodded and said, "Wow, Brother Lu, you are so awesome! After using this symbol, it has been much more convenient. I don't know how fast the calculation speed is!"

...

Huang Yueying was very smart, and she quickly recorded all the Arabic numerals.

Next, Lu Bu continued to explain: "Let's assume that the team's speed is V1, and the centurion's speed is V2..."

Then Huang Yueying asked again: "Brother Lu, what is the speed? What are V1 and V2?"

Well, well, this unknown issue needs to be explained again.

Later, as for the equal sign, multiplication, division, and square, each noun needs to be explained patiently.

However, Huang Yueying's ability to accept is really strong. If it were other children, she would have been confused by so much new knowledge. How could she understand what Lu Bu was talking about?

But Huang Yueying not only understood it, but also summarized and absorbed all of this knowledge and mastered it completely.

This understanding was really amazing and shocked Lu Bu.

You know, it took more than ten days to remember these things.

After this explanation, Lu Bu found that it was already dinner time, so he took Huang Yueying's hand and went out for dinner.

Huang Yueying said excitedly: "Brother Lu, I found that after listening to the question you explained today, there seemed to be a door open in front of me. Brother Lu, are these all you thought of? You are really amazing!"

Ahem, I'm not really awesome at all. I'm just standing on the shoulders of giants...

Lu Bu said in a straightforward manner: "Yueying, there are actually many interesting and interesting places in mathematics. For example, when measuring land, if the land is trapezoidal, how do you calculate its area? It is the number of acres."

"What if it is a rectangle? What about a circle? What about an oval? What about a triangle? And how to calculate how much water can a pond hold? How much water can a bucket hold? And so on, there are many interesting things!"

Huang Yueying couldn't help but ask Lu Bu with his eyes lit up: "Brother Lu, can you teach me all this knowledge? The things you explained are really amazing!"

Lu Bu laughed and said, "Of course, I'll make these math problems a book. I'll show you after dinner."

Huang Yueying couldn't help but shake Lu Bu's hand and said, "Brother Lu, you can take it now, I want to see it now."

Lu Bu laughed and said, "Okay, wait, I'll get it for you now."

As he said that, Lu Bu returned to the study room, took out two books and handed them over to Huang Yueying.

These two books were excerpted by Lu Bu from modern primary and junior high school textbooks. As for the more advanced ones, they are not available for the time being.
Chapter completed!