You are given a math word problem and you are supposed to apply a single mathematical operator 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:
helen the hippo and her friends are preparing for thanksgiving at helen 's house . helen baked 435 chocolate chip cookies yesterday and 139 cookies this morning . how many cookies did helen bake ?

Ex Output:
574

Ex Input:
jerry had $ 18 . he spent $ 6 on new video games . how much money does he have now ?

Ex Output:
12

Ex Input:
my car gets 20 miles per gallon . how many miles can i drive on 5 gallons of gas ?

Ex Output:
100