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: An oil pipe in the sea broke . Before engineers started to fix the pipe , 2475 gallons of oil leaked into the water . A total of 6206 gallons of oil leaked before the pipe was fixed . How many gallons of oil leaked while the engineers were fixing the pipe ?
Example Output: 3731

Example Input: It took Amanda 5 hours to stroll to Kimberly 's house at 2 miles per hour . How far is it between Amanda 's house and Kimberly 's house ?
Example Output: 10

Example Input: Jeremy strolled 20 kilometers at 2 kilometers per hour . How long did Jeremy stroll ?
Example Output:
10