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

Ex Input:
Problem: a jogger running at 9 kmph along side a railway track is 260 metres ahead of the engine of a 120 metre long train running at 45 kmph in the same direction . in how much time will the train pass the jogger ?

Ex Output:
38 sec


Ex Input:
Problem: the population of a city is 415600 . it increased by 25 % in the first year and decreased by 30 % in the second year . what is the population of the city at the end of second year ?

Ex Output:
363650


Ex Input:
Problem: 20 is subtracted from 80 % of a number , the result is 60 . find the number ?

Ex Output:

100