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

Ex Input:
Problem: income and expenditure of a person are in the ratio 7 : 6 . if the income of the person is rs . 14000 , then find his savings ?

Ex Output:
2000


Ex Input:
Problem: the average weight of 4 person ' s increases by 8.5 kg when a new person comes in place of one of them weighing 95 kg . what might be the weight of the new person ?

Ex Output:
129 kg


Ex Input:
Problem: at a school , 3 - fifths of the male students and two - thirds of the female students speak a foreign language . if the number of males is equal to the number of females , what fraction of the students speak a foreign language ?

Ex Output:

19 / 30