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:
5 boats are in the lake . Each boat has 3 people . How many people are on boats in the lake ?
answer:
15


question:
Sam found 35 seashells on the beach , he gave Joan 18 of the seashells . How many seashells does he now have ?
answer:
17


question:
Nancy found 35 seashells and 25 starfish on the beach . She gave 17 of the seashells to Jason . How many seashells does Nancy now have ?
answer:

18