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

Ex Input:
Problem: find the simple interest on rs . 70,000 at 16 2 / 3 % per year for 9 months .

Ex Output:
8750


Ex Input:
Problem: arjun started a business with rs . 20,000 and is joined afterwards by anoop with rs . 80 , 000 . after how many months did anoop join if the profits at the end of the year are divided equally ?

Ex Output:
9


Ex Input:
Problem: average between two sets of numbers is closer to the set withmore numbers ?

Ex Output:

80