I never thought I'd be contemplating pi in the garden. No, that's not a typo: get your head out of the pumpkin pie!
I was wondering the length of chickenwire I'd need for a circular compost pile so that it'd fit in a 5' x 5' area. There's a formula for that! Circumfrance (length of chicken wire)
= diameter x pi.
Wow, maybe higher math is useful afterall. Well, somewhat. If calculus has come in handy in your day to day life, let me know.