I figured I ought to do something with the Pi for Pi day (3/14) so i installed Pi on my Pi,

sudo apt-get install pi

then i calculated Pi on the Pi to 3.141593 (rounded) million decimal places.

pi 3141593 > pimil.txt

The calculation took 132 seconds on my old Pi (256 MB version B) running at 1100 Mhz arm, 500 ram, and 500 core.

If you were to run a heavily overclocked Pi all day (on Pi day) calculating Pi, I think you could probably get close to calculating Pi-billion decimal places of Pi but I'm not sure if Pi would calculate that many digits of Pi on the Pi due to memory size constraints.

Bryan