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

Example Input: Problem: after decreasing 24 % in the price of an article costs rs . 684 . find the actual cost of an article ?
Example Output: 900

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: if n is a positive integer and the product of all integers from 1 to n , inclusive , is a multiple of 630 , what is the least possible value of n ?
Example Output:
7