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

Ex Input:
Problem: find the area of a parallelogram with base 10 cm and height 20 cm .

Ex Output:
200


Ex Input:
Problem: the sum of ages of 5 children born 1 years different each is 30 years . what is the age of the elder child ?

Ex Output:
8


Ex Input:
Problem: a sum of money deposited at c . i . amounts to rs . 2420 in 2 years and to rs . 3025 in 3 years . find the rate percent ?

Ex Output:

25