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

Ex Input:
Problem: a train 200 m long can cross an electric pole in 5 sec and then find the speed of the train ?

Ex Output:
144

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: if n is a positive integer and n ^ 2 is divisible by 72 , then the largest positive integer w that must divide n is ?

Ex Output:
12