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.

[Q]: at the edge of the forest an anthill is blocking the way out . in order to pass through he needs to help the ants gather food . if the ants need 911 grains of food and they already have 762 how many more grains are needed to be gathered ?
[A]: 149

[Q]: thanksgiving came and their family hosted their building 's thanksgiving dinner . they prepared a lot of food so she asked her parents if they could donate some to the soup kitchen next bock . if they prepared 36 turkeys and gave 18 of it to the soup kitchen how many were left for them to eat ?
[A]: 18

[Q]: jerry had $ 18 . he spent $ 6 on new video games . how much money does he have now ?
[A]:
12