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

Ex Input:
Problem: if the simple interest on a sum of money for 2 years at 5 % per annum is rs . 52 , what is the compound interest on the same sum at the rate and for the same time ?

Ex Output:
s . 53.30


Ex Input:
Problem: in a garment industry , 12 men working 9 hours per day complete a piece of work in 10 days . to complete the same work in 12 days , working 15 hours a day , the number of men required is :

Ex Output:
7


Ex Input:
Problem: if z is a multiple of 8778 , what is the remainder when z ^ 2 is divided by 9 ?

Ex Output:

0