The task is to generate the correct answer for a given math problem.

Example Input: Problem: how many zeroes are there at the end of the number n , if n = 70 ! + 140 ! ?
Example Output: 16

Example Input: Problem: the product of two successive numbers is 4160 . which is the smaller of the two numbers ?
Example Output: 64

Example Input: Problem: the sum of the even numbers between 1 and n is 89 * 90 , where n is an odd number , then n = ?
Example Output:
179