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.

[EX Q]: Context: Kelly has 20 nintendo games and 70 sony games. 

 Question: How many nintendo games does she need to give away so that she will have 12 nintendo games left?
[EX A]: 8

[EX Q]: Context: 4 birds and 3 storks were sitting on the fence. 6 more storks came to join them. 

 Question: How many more storks than birds are sitting on the fence?
[EX A]: 5

[EX Q]: Context: Dan has $ 4. He bought a chocolate for $ 7 and a candy bar for $ 2. 

 Question: How much money did he spend to buy chocolate than he did to buy candy bar?
[EX A]:
5