我有个同学说圆周率准确值是[(91145585838405/43580645742454)*10的31次]开根号63次.我拿计算器算了一下是正确的,这玩艺儿怎么来的?拿计算器算出来的答案刚好就是那个符号π,相当于是先输入π,再按

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