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

Input: Consider Input: Problem: if mn = 0 and 25 percent of n equals 37 1 / 2 percent of m , what is the value of 12 n / m ?

Output: 18

Input: Consider Input: Problem: a train 200 m long can cross an electric pole in 5 sec and then find the speed of the train ?

Output: 144

Input: Consider Input: Problem: on average , machine a will produce a completed item once every 4 minutes , and machine b will produce a completed item once every 5 minutes . the number of items machine a produces in a 24 - hour period is approximately what percent greater than the number of items machine b would produce in that same period ?
Output: 25 %