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

Example Input: Problem: find the simple interest on rs . 70,000 at 16 2 / 3 % per year for 9 months .
Example Output: 8750

Example Input: Problem: you collect baseball cards . suppose you start out with 15 . maria takes half of one more than the number of baseball cards you have . since you ' re nice , you give peter 1 baseball card . since his father makes baseball cards , paul decides to triple your baseball cards . how many baseball cards do you have at the end ?
Example Output: 18

Example Input: Problem: after successive discounts of 20 % , 10 % and 5 % a certain good is sold for rs . 6500 . find the actual price of the good .
Example Output:
s . 9503