Im a high-schooler in Oregon, got an xo throught G1G1 and have been Hacking / Modding ( what ever you want to call it ) sence i got it. So far I have contributed:
-A pippy demo that computed pi http://wiki.laptop.org/go/Pippy#compute_pi.21
 An answer
 Re: Compute Pi
Travis Hall wrote the pi computation demo http://wiki.laptop.org/go/User:Odel
There he asked how to increase the precision available to his code. Python has two relevant numeric types, integers and floating-point values. The former numeric type is of infinite precision, whereas the floating-point is an IEEE "double" of 64 bits. Accumulate your result as an integer and infer the decimal position by some other means.