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

Ex Input:
Problem: p , q and r together earn rs . 1710 in 9 days . p and r can earn rs . 600 in 5 days . q and r in 7 days can earn rs . 910 . how much amount does r can earn per day ?

Ex Output:
s . 60

Ex Input:
Problem: a rectangle having length 89 cm and width 34 cm . if the length of the rectangle is increased by eighty percent then how much percent the breadth should be decreased so as to maintain the same area .

Ex Output:
47.33 %

Ex Input:
Problem: the area of an isosceles trapezoid with sides of length 5 and bases of length 9 and 15 is ?

Ex Output:
48