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

Input: Consider Input: Problem: if a drawing has an outer circle of diameter 30 and an inner circle of diameter 24 , then what fraction of outer circle ' s surface is not covered by the inner circle ?

Output: 9 / 25', 'e ) 2 / 3'


Input: Consider Input: Problem: what is the sum of the numbers between 1 and 14 , inclusive ?

Output: 105


Input: Consider Input: Problem: there are two positive numbers in the ratio 4 : 8 . if the larger number exceeds the smaller by 16 , then find the smaller number ?


Output: 20