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: Mary is baking a cake. The recipe calls for 11 cups of flour and 7 cups of sugar. She already put in some cups of flour. If she still needs 2 more cups of flour than sugar 

 Question: How many cups of flour did she put in?
Example Output: 2

Example Input: Context: Julia played tag with 18 kids on monday. She played tag with 10 kids on tuesday. 

 Question: How many more kids did she play with on monday than on tuesday?
Example Output: 8

Example Input: Context: Next on his checklist is wax to stick the feathers together and colors to paint them. He needs a total of 49 g of colors to paint them. If the feathers require 288 g of wax and right now he just needs 260 g 

 Question: How many grams of wax does he already have?
Example Output:
28