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

Ex Input:
Alyssa 's dog had puppies . She gave 7 to her friends . She now has 5 puppies . How many puppies did she have to start with ?

Ex Output:
12


Ex Input:
Jack has a section filled with short story booklets . If each booklet has 9 pages and there are 49 booklets in the short story section , how many pages will Jack need to go through if he plans to read them all ?

Ex Output:
441


Ex Input:
If Benjamin strolled 14 miles at 2 miles per hour , how long was Benjamin travelling ?

Ex Output:

7