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.

Ex Input:
Context: Danny collects bottle caps and wrappers. He found 71 bottle caps and 24 wrappers at the park. Now he has 28 bottle caps and 16 wrappers in his collection. 

 Question: How many more bottle caps than wrappers does danny have now?

Ex Output:
12


Ex Input:
Context: There were 174 parents in the program and 521 pupils too. 

 Question: How many more pupils were present compared to parents in the program?

Ex Output:
347


Ex Input:
Context: After eating a hearty meal they went to see the Buckingham palace. There, Rachel learned that 45 visitors came to the Buckingham palace on the previous day. If 829 people visited the Buckingham palace within the past 85 days 

 Question: How many visitors visited the Buckingham palace on that day?

Ex Output:

784