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

Input: Consider Input: Problem: two cars start at the same time from opposite ends of a highway that is 175 miles long . one car is riding at 25 mph and the second car is riding at 45 mph . how long after they begin will they meet ?

Output: 2.5


Input: Consider Input: Problem: tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random . what is the probability taht the ticket drawn has a number which is a multiple of 3 or 5 ?

Output: 9 / 20


Input: Consider Input: Problem: how many positive even integers less than 100 contain digits 5 or 9 ?


Output: 10