Eli5: How does pie have so many digits? Why was it created? What other use does it serve?

Question

Like, it’s just a number why is it SO specific? Other than circles I can’t think of a use that pie has. Why would we create something that only has one use (that I know of) that is almost always simplified?

In: 0

Answer 1

I don’t know, but this guy Daniel T. memories Pi to 22,500 decimal places. He is a savant.