......................... solved it. Who is a good man?

China ancient (Southern and Northern Dynasties) scientist (Zu Chongzhi) made pi accurate to the sixth place after the decimal point for the first time.

Zu Chongzhi: /view/2 122.htm

Results: Based on the annotation of Liu Hui's Nine Chapters Arithmetic, it greatly promoted traditional mathematics and became a model of attaching importance to mathematical thinking and reasoning. He also made outstanding contributions to astronomy. His book seal script has been lost. According to historical records, there are three main achievements in mathematics: (1) Calculate pi to the sixth place after the decimal point and get 3. 14 15926.

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The one downstairs is someone. ....