Lisp

Problem Statement

\(n!\) means \(n \times (n - 1) \times … \times 3 \times 2 \times 1\).

For example, \(10! = 10 \times 9 \times … \times 3 \times 2 \times 1 = 3628800\), 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 \(100!\)