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

[Q]: Karin 's science class weighed plastic rings for an experiment . They found that the orange ring weighed 0.08333333333333333 ounce , the purple ring weighed 0.3333333333333333 ounce , and the white ring weighed 0.4166666666666667 ounce . What was the total weight of the plastic rings ?
[A]: 0.8333333333333334

[Q]: Vincent bought 10 books about animals , 1 book about outer space , and 3 books about trains . Each book cost $ 16 . How much did Vincent spend on the books ?
[A]: 224

[Q]: Rose has 9 apples and 12 erasers . If she shares the apples among 3 friends , how many apples does each friend get ?
[A]:
3