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

Ex Input:
Problem: if the sides of a triangle are 26 cm , 24 cm and 15 cm , what is its area ?

Ex Output:
180


Ex Input:
Problem: two pipes can fill the cistern in 10 hr and 12 hr respectively , while the third empty it in 30 hr . if all pipes are opened simultaneously , then the cistern will be filled in

Ex Output:
6.67 hr


Ex Input:
Problem: how many positive integers less than 100 have a reminder 5 when divided by 7 ?

Ex Output:

14