You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example input: For the school bake sale Bianca made 14 cupcakes . If she sold 6 of them and then made 17 more , how many cupcakes would she have ?
Example output: 25
Example explanation: Total cupcakes she would have = baked - sold = 14 -6 + 17 = 25 
Q: Haley baked 20 cupcakes for her school 's bake sale . If her brother , Todd , ate 11 of them how many packages could she make if she put 3 cupcake in each package ?
A:
3