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

Example Input: Problem: a number x is 5 times another number y . the percentage that y is less than x is
Example Output: 80 %

Example Input: Problem: a train passes a station platform in 30 sec and a man standing on the platform in 20 sec . if the speed of the train is 54 km / hr . what is the length of the platform ?
Example Output: 60 

Example Input: Problem: if one - third of one - fourth of a number is 18 , then 3 - tenth of that number is : a . 35
Example Output:
64.8