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

Input: Consider 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 ?

Output: 10

Input: Consider Input: Problem: 475.124 x 15.98 8.001 + 33.33 = ?

Output: 983.578

Input: Consider Input: Problem: a certain car uses 12 gallons of gasoline in traveling 120 miles . in order for the car to travel the same distance using 10 gallons of gasoline , by how many miles per gallon must the car ' s gas mileage be increased ?
Output: 2