16! is equal to which of the following?  Pick one
A) 20,922,789,888,321 B) 20,922,789,888,000 C) 20,922,789,888,525 D) 20,922,789,888,416 E) 20,922,789,888,928
After 4!, the units digit of every factorial is 0.   5!=120   6!=720   etc...   The answer is 20,922,789,888,000.
<result>B</result>
16! is equal to which of the following?