What is the value of $\displaystyle{{(3!)!\over3!}}$?
It means the product of all positive integers up to and including the given number. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120. So, 3! = 3 x 2 x 1 = 6, and (3!)! = 6! = 6 x 5 x 4 x 3 x 2 x 1 = 720. Now I can plug these values into the expression and simplify. $\displaystyle{{(3!)!\over3!}} = {720\over6} = 120$.

