http://projecteuler.net/problem=20  -  n! means n  (n  1)  ...  3  2  1  For example, 10! = 10  9  ...  3  2  1 = 3628800, and the sum of the digits in the number 10! is 3 + 6 + 2 + 8 + 8 + 0 + 0 = 27.  Find the sum of the digits in the number 100!