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

Example Input: Problem: how many integers n are prime numbers in the range 200 < n < 220 ?
Example Output: 1

Example Input: Problem: the number of boxes in a warehouse can be divided evenly into 7 equal shipments by boat or 28 equal shipments by truck . what is the smallest number of boxes that could be in the warehouse ?
Example Output: 28

Example Input: Problem: how many integers between 1 and 10 ^ 16 are such that the sum of their digits is 2 ?
Example Output:
136