# Homework Help: Help with Large Pi thing

1. Sep 14, 2010

### fallen186

1. The problem statement, all variables and given/known data
$$\Pi_{n=1}^{5} n$$

2. Relevant equations
My teacher assumed I learned this in calc 2 but I was never taught this. Can someone tell me what this thing is called?

2. Sep 14, 2010

### phyzguy

It means a "product", like a capital sigma means a "sum", and you interpret it the same way. So this reads, "the product of n, from n=1 to n=5", in other words 1*2*3*4*5, which in this case equals 5!.