After laughing, Changsun Wuji said, "Aren't you still missing two people? I can go to Chongwen Hall with you."

"Thank you!" After Li Chunfeng thanked, he turned to look at Wang Xiaotong and others, and asked, "I wonder if several doctors are still willing to help?"

"this……"

For a moment, Wang Xiaotong and the other two were a little hesitant. After all, Li Chunfeng ridiculed Dong Wenshu just now, so he felt a grudge in his heart.

But then again, the princess's brother has gone there personally. Does these people have room for no one?

After a moment of hesitation, the five people said in unison: "We are willing to go."

"Then you guys have more."

So, with Changsun Wuji's squadron, Dong Wenshu and others dared not complain anymore, and followed Li Chunfeng honestly. Finally, Li Chunfeng found the last person and turned around to walk towards Chongwen Palace.

By the way, Li Chunfeng had been out of Chongwen Hall for a while. When he brought everyone back to Chongwen Hall, Li Chengqian and Li Lizhi were sitting in the hall taking a nap.

"Little Prince? Little County Lord?" Li Chunfeng called out in a low voice when he came closer.

"Huh? Who?" Li Chengqian rubbed his eyes and opened his eyes. The first thing he saw was Changsun Wuji over there.

"Uncle! Uncle!——"

A cheer came, and Li Chengqian stood up and ran towards Changsun Wuji over there.

Li Chunfeng was stunned and said to himself: "Uncle? Could it be that this fifth-rank official is Changsun's biological brother - Changsun Wuji?"

After knowing that the person in front of him was the famous Changsun Wuji, Li Chunfeng began to reexamine him.

"Uncle hasn't come to see Qian'er for a long time." Li Chengqian kept acting coquettishly in Changsun Wuji's arms.

Changsun Wuji smiled and said, "Hahaha, isn't my uncle here?"

The court etiquette of the Tang Dynasty was not as high as that of the Ming and Qing Dynasties, so Li Chengqian had such an intimate interaction with Changsun Wuji.

Li Lizhi also came over and said in a silence: "Uncle."

"Zhi'er comes here and let your uncle hug you." As soon as he stretched out his hand, Changsun Wuji reported Li Lizhi and Li Chengqian together.

Changsun Wuji, Li Chengqian, and Li Lizhi showed off their family there, and Li Chunfeng and others stood there a little embarrassedly. They all felt that they were redundant.

Finally, Changsun Wuji remembered the serious business and put down Li Chengqian and Li Lizhi and said, "Qian'er, Zhi'er, I heard that Dr. Li gave you a question?"

"Well," Li Li said angrily, "Dr. Li asked my brother and I, ten people, how many hands we have in total and how many fingers we have in total."

"Have you figured out that quality?"

Li Lizhi's little head was shaking like a rattle, and she said, "No."

Changsun Wuji turned his head, looked at Li Chunfeng, and said, "Dr. Li, you can start your teaching."

"Oh, okay." Li Chunfeng came to his senses and looked at Li Chengqian and said, "Little Prince, do you still remember the result I said?"

Li Chengqian said: "Dr. Li said that there are 100 fingers in total in ten people."

"That's right." Li Chunfeng said, "Now, there are exactly ten people here. The little prince can verify it with his or her parents."

Li Chengqian looked at Changsun Wuji, who smiled and said, "Qian'er, let's start."

"Um."

Li Chengqian began to shuttle between the crowd, accompanied by a crisp voice: "One, two, three..."

Li Chengqian counted clearly one by one, from one to one hundred, without any pause or hesitation in the middle. This shows that Li Chengqian must have received a good enlightenment education before.

Finally, Li Chengqian counted the last three fingers on his hand: "Ninety-eight, ninety-nine, one hundred."

After counting, Li Chengqian's eyes lit up and his eyes turned to Li Chunfeng and said, "It's really one hundred."

Li Chunfeng smiled slightly: "That's natural."

"How did you calculate?"

Li Chunfeng smiled and said, "Actually, this is very simple."

As he said that, Li Chunfeng came to the two large tables in Chongwen Hall, then took a brush from the table, and while writing, he said, "A person has two hands and five fingers on one hand."

Li Chunfeng wrote "2X5" on the paper and paused for a moment. Li Chunfeng sketched "=10" behind him.

"One person is 10 fingers, and those ten people are 10X10, and the result is equal to 100."

After Li Chunfeng wrote these, Wang Xiaotong, Dong Wenshu and others frowned.

"Dr. Li, what does the symbol you wrote mean?"

Li Chunfeng held a pen, pointed to the numbers, and said, "What do these mean one and zero, and they are Arabic numerals."

“Arabic numerals?”

When they heard this word, Wang Xiaotong and five other experts with great knowledge were surprised. It was obvious that this was the first time they heard the word "Arabic numerals".

Changsun Wuji said: "Arabic numerals? Could it be that this Arabia is a country?"

Li Chunfeng nodded: "The doctor said it well. Arabia is a country. Because the numerical symbols they invented are very clear, simple, and easier to be accepted when performing arithmetic calculations."

"How do other numbers be expressed in Arabic numerals?"

"This is 1, this is 2, this represents 3..."

So, Li Chunfeng wrote all the numbers 0 to 9 on paper and explained in detail the combination of them.

After listening to Li Chunfeng's explanation, Changsun Wuji praised: "It's amazing. I didn't expect that 0 would have such a function. When using these Arabic numerals to represent large numbers, it was indeed much easier."

Li Chunfeng smiled and said, "Not only that, but this expression can be expressed using vertical calculation methods."

As he said that, Li Chunfeng demonstrated the double-digit multiplication calculation to Changsun Wuji on the spot, even elementary school students can do in modern times.

Li Chunfeng calculated the calculations on the spot and quickly calculated the results. Wang Xiaotong and others on the side all looked incredible.

Changsun Wuji smiled and said, "Hahaha, you guys really have a chance. It seems that this is the calculation method you used in Huancai Pavilion a few days ago?"

Li Chunfeng said: "Uh, that's right."

"Okay, it's true that you are young and promising," said Changsun Wuji. "It seems that the princess teaches you how to teach Qian'er and Zhi'er arithmetic."

"Doctor Changsun is in love with you." Li Chunfeng said, "I am just a little bit of calculation and understand a little."

Wang Xiaotong and others on the side heard Li Chunfeng's words and looked very complicated and said to himself: "If you understand everything a little bit, then wouldn't we besides not distinguishing one or two?"

"Okay, OK, Dr. Li, don't be humble anymore," said Changsun Wuji, "There are no outsiders here. You have the ability to open your horizons today." Turning his head, Changsun Wuji looked at Li Chengqian, and Li Lizhi said, "Qian'er, Zhi'er, you must learn this calculation technique with Dr. Li in the future."

"God'er remembered."

"Yi'er remembers it."
Chapter completed!