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

Q: Sara has 792 black and 122 red marbles . Fred took 233 of Sara 's black marbles . How many black marbles does Sara now have ?

A: 559
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Q: Maria has 3 boxes of eggs . Each box holds 7 eggs and there are 8 boxes in a case . How many eggs does Maria have ?

A: 21
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Q: Sally has 9 orange balloons and 4 blue balloons . She lost 2 of the orange balloons . How many orange balloons does Sally have now ?

A:
7
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