You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example Input: Irwin 's family went on a camping trip in the mountains . On the first day , they hiked from their car to the campsite . First , they hiked 0.2 mile from the car to a stream , and 0.4 mile from the stream to a meadow . Then they hiked 0.1 mile from the meadow to the campsite . How many miles did Irwin 's family hike in all ?
Example Output: 0.7

Example Input: The schools debate team had 11 boys and 45 girls on it . If they were split into groups of 7 how many groups could they make ?
Example Output: 8

Example Input: Diane has 37 crayons . She gets 5 more from Frances . Later , Diane buys 16 cards at the store . How many crayons does Diane have in all ?
Example Output:
42