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

Ex Input:
Problem: a man can row 6 kmph in still water . when the river is running at 3 kmph , it takes him 1 hour to row to a place and black . what is the total distance traveled by the man ?

Ex Output:
4.5


Ex Input:
Problem: what is the sum of the numbers between 1 and 14 , inclusive ?

Ex Output:
105


Ex Input:
Problem: a shopkeeper sold an book offering a discount of 5 % and earned a profit of 23.5 % . what would have been the percentage of profit earned if no discount was offered ?

Ex Output:

130