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

Ex Input:
Problem: the perimeter of a triangle is 36 cm and the inradius of the triangle is 2.5 cm . what is the area of the triangle

Ex Output:
b ) 45


Ex Input:
Problem: a student committee on academic integrity has 132 ways to select a president and vice president from a group of candidates . the same person can not be both president and vice president . how many candidates are there ?

Ex Output:
1


Ex Input:
Problem: a person purchased a tv set for rs . 16000 and a dvd player for rs . 6250 . he sold both the items together for rs . 35600 . what percentage of profit did he make ?

Ex Output:

60 %