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

Ex Input:
Problem: given that p is a positive even integer with a positive units digit , if the units digit of p ^ 3 minus the units digit of p ^ 2 is equal to 0 , what is the units digit of p + 4 ?

Ex Output:
10

Ex Input:
Problem: the size of a television screen is given as the length of the screen ' s diagonal . if the screens were flat , then the area of a square 19 - inch screen would be how many square inches greater than the area of a square 17 - inch screen ?

Ex Output:
36

Ex Input:
Problem: the sale price sarees listed for rs . 375 after successive discount is 20 % and 15 % is ?

Ex Output:
28