title: Find the sum of digits in 100!
url: http://projecteuler.net/problem=20

desc: |
  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!
  
solution: Bruteforce

solutions:
  solve.php:
    desc: Basic solution
    language: php
  solve.rb:
    desc: Basic solution
    language: ruby