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

Ex Input:
Problem: if s and t are both odd prime numbers ands < t , then how many different positive integer factors does 2 sthave ?

Ex Output:
8

Ex Input:
Problem: what is the value of x ^ 2 yz xyz ^ 2 , if x = 2 , y = 1 , and z = 1 ?

Ex Output:
6

Ex Input:
Problem: the spherical ball of lead 3 cm in diameter is melted and recast into 3 spherical balls . the diameters of two of these are 1 1 / 2 cm and 2 cm respectively . the diameter of third ball is ?

Ex Output:
2.5