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: when positive integer n is divided by positive integer p , the quotient is 18 , with a remainder of 7 . when n is divided by ( p + 3 ) , the quotient is 15 and the remainder is 1 . what is the value of n ?

Ex Output:
20


Ex Input:
Problem: find the length of the wire required to go 11 times round a square field containing 27889 m 2 .

Ex Output:

7348