instruction:
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.
question:
Context: They decided to hold the party in their backyard. They have 10 sets of tables and each set has 6 chairs. If there are 11 people sitting on chairs 

 Question: How many chairs are left unoccupied?
answer:
49


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

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


question:
Context: Paco had 9 sweet cookies and 6 salty cookies. He ate 36 sweet cookies and 3 salty cookies. 

 Question: How many salty cookies did Paco have left?
answer:

3