有甚麼程式可以計算很長的小數位？

you might want to try Microsoft Office Excel, first you put in the formula what you want to calculate,, than u right click where the answer is ,, go to "format cells" than go to numbers,,you can set up the answer with 30 decimal places.

可下载及安装以下软件便可：http://jaist.dl.sourceforge.net/sourceforge/gcalc/GraphCalc4.0.1.exe