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

Ex Input:
Problem: convert 2 / 5 to a decimal

Ex Output:
0.4

Ex Input:
Problem: what least number must be subtracted from 13294 so that the remainder is exactly divisible by 97 ?

Ex Output:
5

Ex Input:
Problem: a can give b 50 meters start and c 200 meters start in a kilometer race . how much start can b give c in a kilometer race ?

Ex Output:
157.89