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:
larry 's lawn care charges 9 bucks to trim a hedge . if henry has 3 hedges how much money would he spend ?

Ex Output:
27

Ex Input:
frank got 15 pounds of mushroom for family barbecue . if they ate 8 pounds how many pounds were left ?

Ex Output:
7

Ex Input:
jerry is helping to put away books . if he has 12 books to put away and each shelf can hold 4 books how many shelves will he need ?

Ex Output:
3