π的精确值，包含小数点后一亿位。

简介：
The value of pi, extending to a staggering one billion digits after the decimal point, represents a fundamental constant in mathematics. This remarkably precise representation of the ratio of a circles circumference to its diameter provides a cornerstone for numerous calculations and theories within various scientific disciplines. The exhaustive determination of these digits—spanning an immense sequence—is a testament to computational advancements and the pursuit of increasingly accurate numerical values.