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: Students at Arcadia schools are participating in a coat drive . 9437 coats have been collected so far . 6922 coats were collected from the high schools , and the rest from the elementary schools . How many coats were collected at the elementary schools ?

A: 2515
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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
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Q: Janet picked 4 tulips and 11 roses to make flower bouquets . If she only used 11 of the flowers though , how many extra flowers did Janet pick ?

A:
4
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