Put in a number! The bigger it is, the closer to pi it gets. (It can take a long time for larger numbers) It can get as close as 3.141 or as far away as 4, but it tends to be equal to pi. The cool thing is it has nothing to do with circles. (Or does it?)
Here is a nice website kind of explaining it. http://mste.illinois.edu/activity/buffon/
