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: There are 7.75 gallons of water in Becky 's fish tank . If Becky adds 7 gallons more , how many gallons will there be in all ?
Example Output: 14.75

Example Input: My car gets 20 miles per gallon of gas . If Grandma ’ s house is 100 miles away , how many gallons of gas would it take to get to her house ?
Example Output: 5

Example Input: Professor Ellison weighed 2 pieces of metal for an experiment . The piece of iron weighed 11.166666666666666 pounds and the piece of aluminum weighed 0.8333333333333334 pound . How much more did the piece of iron weigh than the piece of aluminum ?
Example Output:
10.333333333333334

