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.

Example Input: Andrew spent 3 day working on his Science report . He worked for 2.5 hours each day . How many hours did he work ?
Example Output: 7.5

Example Input: My car gets 20 miles per gallon . How many miles can I drive on 5 gallons of gas ?
Example Output: 100

Example Input: Joyce has 40 bananas that must be put away in boxes . Fred comes to help and brings 18 cookies to share with Joyce . If there are 10 boxes , how many bananas must go in each box ?
Example Output:
4