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

Ex Input:
Problem: students at a school were on average 180 cm tall . the average female height was 170 cm , and the average male height was 182 cms . what was the ratio of men to women ?

Ex Output:
5 : 1

Ex Input:
Problem: how many quarters are equal to 7 dollars ?

Ex Output:
28

Ex Input:
Problem: a big container is 30 % full with water . if 45 liters of water is added , the container becomes 3 / 4 full . what is the capacity of the big container ?

Ex Output:
100 liter