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

Example Input: It took Amanda 2 hours to stroll to Kimberly 's house at 4 miles per hour . How far is it between Amanda 's house and Kimberly 's house ?
Example Output: 8

Example Input: Brian ' s car gets 20 miles per gallon . On his last trip , he used 3 gallons of gas . How many miles did he travel on his last trip ?
Example Output: 60

Example Input: Kyle bought a boat for 4500 dollars . 5 years later he sold it for 3600 dollars . What percent of the purchase price did Kyle lose ?
Example Output:
20