1. Divide the integer part of the square number from the single digit to the left, and divide each double digit into several segments, representing how many square roots there are.

2. According to the number in the first paragraph on the left, find the number with the highest square root.

3. Subtract the square of the highest digit from the number in the first paragraph, and write the first remainder of the number in the second paragraph on the right side of their difference.

4. Multiply the highest digit by 20 and try to divide by the first remainder, and the largest integer obtained is the trial quotient.

Multiply this quotient by 20 times of the highest digit of the quotient, and then multiply it by the quotient. Assuming that the relationship between product and remainder is less than or equal to, quotient is the second place of square root; Assuming that the product obtained is greater than the remainder, reduce the trial quotient and try again.

6. In the same way, continue to find the square root of other digits. It's over, it's over.

The square root operation is the square of the number obtained after the square root, which is the original number. It can be said that the square root is the inverse of the square root. Square root, that is, square root operation, first appeared in the chapter of Nine Chapters Arithmetic. Later, Jia Xian, a mathematician in the Northern Song Dynasty, further improved the method of processing and formed a mature programmed method: multiplication Kaiping method.