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

[EX Q]: 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 A]: 10

[EX Q]: Problem: if p / q = 3 / 11 , then 2 p + q = ?
[EX A]: 17

[EX Q]: Problem: how many digits will be there to the right of the decimal point in the product of 89.635 and . 02218 ?
[EX A]:
7