Use the following "Walliss formula" to find an approximation of pi.π = 2 ・ (2 ・ 2 ・ 4 ・ 4 ・ 6 ・ 6 ・ 8 ・ 8 ・ ・ ・) / (1 ・ 3 ・ 3 ・ 5 ・ 5 ・ 7 ・ 7 ・ 9 ...)Lets observe how the approximate value of pi is obtained when the number of numbers in the denominator and numerator is increased.
ウォーリスの公式
