Ah gotcha. It's been a while but as I recall, on tests without calculators we were usually told to use 3.14 and round our answers to the nearest hundredth, though some teachers were more flexible if you were pretty close but slightly off in the decimals, while tests with calculators were pretty stringent on being precise. And yeah, I remember pretty early to ensure the decimal lengths because I tended to use the calculator's length of π instead of hundredths or thousandths or whatever and it botched my answers after rounding off.

I feel ya there, though I'm starting up school again in the fall so this is getting me somewhat excited for math classes again.