You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
A chef needs to cook 9 potatoes . He has already cooked 7 . If each potato takes 3 minutes to cook , how long will it take him to cook the rest ?

Ex Output:
6


Ex Input:
Bianca and her friends were recycling paper for their class . For every 3 pounds they recycled they earned one point . If Bianca recycled 24 pounds and her friends recycled 3 pounds , how many points did they earn ?

Ex Output:
9


Ex Input:
Roger had 16 dollars . For his birthday he got 28 more dollars but spent 25 on a new game . How much money does he have now ?

Ex Output:

19