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: 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: There were 28 girls and 35 boys on the playground at recess . How many children were there in all ?
Example Output: 63

Example Input: A DVD book holds 126 DVDs . There are 81 DVDs already in the book . How many more DVDs can be put in the book ?
Example Output:
45