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.

Input: Consider Input: Context: Mary is baking a cake. The recipe calls for 12 cups of sugar and 14 cups of flour. She already put in 10 cups of sugar.

Question: How many more cups of flour than cups of sugar does she need to add now?

Output: 12

Input: Consider Input: Context: Last week Fred had 19 dollars and Jason had 16 dollars. They washed cars over the weekend and now Fred has 40 dollars and Jason has 69 dollars.

Question: How much money did Fred earn over the weekend?

Output: 21

Input: Consider Input: 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?
Output: 49