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.

Context: Jerry had 7 action figures and 2 books on a shelf in his room. Later he added 4 more books to the shelf. 

 Question: How many more action figures than books were on his shelf?
1

Context: Jesse's room is 12 feet long and 11 feet wide. 

 Question: How much longer is her room than it is wide?
1

Context: They decided to hold the party in their backyard. They have 4 sets of tables and each set has 3 chairs. If a total of 14 people will attend the party 

 Question: How many more chairs will they have to buy?

2