instruction:
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.
question:
My car gets 20 miles per gallon . How many miles can I drive on 5 gallons of gas ?
answer:
100


question:
Each year , salmon travel upstream , going from the ocean to the rivers where they were born . This year , 712261 male and 259378 female salmon returned to their rivers . How many salmon made the trip ?
answer:
971639


question:
Brad has 17 balloons . 8 balloons are red and the rest are green . How many green balloons does Brad have ?
answer:

9