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

Ex Input:
Problem: what is the probability of getting a queen or spade from a set of cards ?

Ex Output:
4 / 13


Ex Input:
Problem: the total age of a and b is 14 years more than the total age of b and c . c is how many years younger than a ?

Ex Output:
14


Ex Input:
Problem: what is 78 % of 4 / 5 ?

Ex Output:

0.624