00:01
So for this question, we're asked to evaluate the factorial expression.
00:04
So remember for n factorial, that's just going to be n times n minus 1 factorial.
00:10
So pretty much, for example, if we have 3 factorial, that's going to be 3 times 3 minus 1 factorial, which is just 3 times 2 factorial, which is 3 times 2 times 1.
00:25
Okay? so 6 factorial would be 6 times 5 times 4 times 3 times 3 times.
00:30
Times 2 times 1 and so on.
00:32
So 12 factorial can be written as 8 factorial.
00:37
Let me just try 8 factorial times 9 times 10 times 11 times 12.
00:48
That's going to be, let me take out this equal sign here...