Science at Home!

Ever wanted to multiply things by pi, but not so good at the math? Well, here is your answer1

1.) Find a round object, like a paper towel tube.
2.) Squish it flat.
3.) Imagine it (or perhaps measure, if you really care) twice as big as it now is.

Congratulations. You have now multiplied by pi, and without all that messy symbolic 'number' business.