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

Input: Consider Input: Problem: a diagonal of a polygon is an segment between two non - adjacent vertices of the polygon . how many diagonals does a regular 20 - sided polygon have ?

Output: 170', 'c ) 1425', 'd ) 2025', 'e ) 2500'

Input: Consider Input: Problem: ? x 12 = 173 x 240

Output: 3460

Input: Consider Input: Problem: if the numerator of a fraction is increased by 20 % and its denominator is diminished by 25 % value of the fraction is 2 / 15 . find the original fraction ?
Output: 1 / 12