圆周率小数点后的一亿位是多少？

答案是2.

计算结果：
Program : PiFast version 4.1, by Xavier Gourdon
Computation of 100000000 digits of Pi
Method used : Chudnovsky
Size of FFT : 8192 K
Physical memory used : ~ 525137 K
Disk memory used : ~ 0.00 Meg
------------------------------------------------------------
Computation run information :

Start : Sun Jun 04 12:54:13 2006
End : Sun Jun 04 13:19:11 2006
Duration : 1498.34 seconds
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Total computation time : 1498.34 seconds (~ 0.42 hours)
============================================================
Pi with 100000000 digits :
Pi = 3.
1415926535 8979323846 2643383279 5028841971 6939937510 : 50
5820974944 5923078164 0628620899 8628034825 3421170679 : 100
....................
6501675375 6332609852 3762615971 6259247683 5831887658 : 99999750
4608008037 9562709698 7475571896 3659163731 5520304139 :