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

Ex Input:
Problem: a train passes a station platform in 36 sec and a man standing on the platform in 25 sec . if the speed of the train is 54 km / hr . what is the length of the platform ?

Ex Output:
165 


Ex Input:
Problem: in how many no . between 10 and 30 exactly two of the digits is 2 ?

Ex Output:
1


Ex Input:
Problem: exactly 35 % of the reporters for a certain wire service cover local politics in country x . if 30 % of the reporters who cover politics for the wire service do not cover local politics in country x , what percent of the reporters for the wire service do not cover politics ?

Ex Output:

50 %