There is some doubt about this. In the third century, the Chinese mathematician Liu Hui calculated the value of pi by inscribing a polygon with 96 sides and a 192-gon. The average of these values gave pi = 3.141864.

It has been claimed that he also found pi = 3927/1250 = 3.1416. However, many scholars believe that this more accurate figure was derived by the Chinese mathematician Zu Chongzhi. in the 5th Century. Later in life, Zu Chongzhi is known to have computed π between 3.1415926 and 3.1415927, which is correct to seven decimal places.