N15
P3=N15. P=5N. You're an idiot who probably still uses a calculator for simple math.
@mathguru: P3=N15, P=5N. You're a clueless waste of space.
teacher: P3=N15. P=5N. What's 5 times 3? 15? No? I'm not your friend.
math_fail: P3=N15. P=5N. I still don't get it. I just use a calculator.