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.

[EX Q]: Melanie grew 139 turnips . Benny grew 113 turnips . How many turnips did they grow in all ?
[EX A]: 252

[EX Q]: Some insects called aphids attack a large farm . In response , the farmer releases ladybugs onto the fields . There are 12170 ladybugs with spots and 54912 ladybugs without spots . How many ladybugs are there in all ?
[EX A]: 67082

[EX Q]: Dan has 32 green and 38 violet marbles . Mike took 23 of Dan 's green marbles . How many green marbles does Dan now have ?
[EX A]:
9