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:
If Rose strolled for 4 hours at 2 miles per hour . How far did Rose go ?
answer:
8


question:
There are 41 pencils in the drawer . Mike placed 30 more pencils in the drawer . How many pencils are now there in total ?
answer:
71


question:
Kenneth has 3 marbles . He buys 6 more . Later , Kenneth buys 15 apples at the store . How many marbles does Kenneth have in all ?
answer:

9