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

Input: Consider 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 ?

Output: 28


Input: Consider Input: Problem: two trains of length 100 meters and 200 meters are 450 meters apart . they are moving towards each other on parallel tracks , at speeds of 90 km / h and 72 km / h . after how many seconds will the trains meet ?

Output: 10


Input: Consider Input: Problem: 14 men make 1400 toy in 5 days 1 day after work 14 more worker join now how may days work can finish


Output: 2 days