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

Ex Input:
Problem: a gambler has won 40 % of his 40 poker games for the week so far . if , all of a sudden , his luck changes and he begins winning 70 % of the time , how many more games must he play to end up winning 60 % of all his games for the week ?

Ex Output:
80


Ex Input:
Problem: a rectangular plot measuring 90 metres by 50 metres is to be enclosed by wire fencing . if the poles of the fence are kept 10 metres apart , how many poles will be needed ?

Ex Output:
28


Ex Input:
Problem: if each side of a square is increased by 325 % in length , find the percentage change in its area ?

Ex Output:

956.25 %