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

Input: Consider Input: Problem: the average of first six prime numbers greater than 20 is ?

Output: 3

Input: Consider Input: Problem: h is a positive integer and 225 and 216 are both divisors of h . if h = ( 2 ^ a ) * ( 3 ^ b ) * ( 5 ^ c ) , where a , b and c are positive integers , what is the least possible value of a + b + c ?

Output: 8

Input: Consider Input: Problem: a telephone company needs to create a set of 3 - digit area codes . the company is entitled to use only digits 2 , 4 and 3 , which can be repeated . if the product of the digits in the area code must be even , how many different codes can be created ?
Output: 26