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

Ex Input:
Problem: at what rate percent on simple interest will rs . 750 amount to rs . 900 in 8 years ?

Ex Output:
2.5 %


Ex Input:
Problem: in traveling from a dormitory to a certain city , a student went 1 / 5 of the way by foot , 2 / 3 of the way by bus , and the remaining 10 kilometers by car . what is the distance , in kilometers , from the dormitory to the city ?

Ex Output:
62


Ex Input:
Problem: a / ( b / c ) in the expression above , a , b , and c are different numbers and each is one of the numbers 2 , 3 , or 6 . what is the largest possible value of the expression ?

Ex Output:

18 / 2