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

Example Input: Problem: a hiker walking at a constant rate of 4 kilometers per hour is passed by a cyclist travelling in the same direction along the same path at a constant rate of 30 kilometers per hour . the cyclist stops and waits for the hiker 5 minutes after passing her while the hiker continues to walk at her constant rate . how many minutes must the cyclist wait until the hiker catches up ?
Example Output: 32.

Example Input: Problem: find the least number must be subtracted from 105829 so that remaining no . is divisible by 21 ?
Example Output: 10

Example Input: Problem: the difference between the value of a number increased by 25 % and the value of the original number decreased by 30 % is 22 . what is the original number ?
Example Output:
40