Detailed Instructions: 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.
Problem:Craig walked 0.2 mile from school to David 's house and 0.7 mile from David 's house to his own house . How many miles did Craig walk in all ?
Solution:
0.9