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

Ex Input:
Problem: 60 percent of movie theatres in town x have 3 screens or less . 20 % of those theatres sell an average of more than $ 300 worth of popcorn per showing . 56 percent of all the movie theatres in town x sell $ 300 or less of popcorn per showing . what percent of all the stores on the street have 4 or more screens and sell an average of more than $ 300 worth of popcorn per day ?

Ex Output:
32

Ex Input:
Problem: how many liters of a 40 % iodine solution need to be mixed with 35 liters of a 20 % iodine solution to create a 32 % iodine solution ?

Ex Output:
102

Ex Input:
Problem: if the difference between the length and breadth of a rectangle is 23 m and its perimeter is 266 m , what is its area ?

Ex Output:
4290