You are given a math word problem and you are supposed to apply a single mathematical operator 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.

[EX Q]: when she came back to her mother she returned $ 27 worth of change . from the initial $ 100 that her mom gave her how much money in total did she spend on buying groceries ?
[EX A]: 73

[EX Q]: a contractor was buying wall outlets for a new house he was building . each room needed 6 outlets . if the house has 7 rooms how many outlets does he need total ?
[EX A]: 42

[EX Q]: olivia picked up 16 pieces of paper from the floor . if edward picked up 3 pieces how many did they pick up total ?
[EX A]:
19

