You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example Input: Context: Marco and his dad went strawberry picking. Marco's strawberries weighed 30 pounds. If together their strawberries weighed 47 pounds.

Question: How much more did his strawberries weigh than his dad's?
Example Output: 13

Example Input: Context: Debby bought 264 water bottles when they were on sale. If she drank 15 bottles a day for 11 days.

Question: How many bottles does she have left?
Example Output: 99

Example Input: Context: There are 14 different movies and 15 different books in the ' crazy silly school ' series. If you read 11 of the books and watched 40 of the movies

Question: How many more books than movies are there in the ' crazy silly school ' series?
Example Output:
1