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.

Input: Consider Input: Mrs. Hilt looked at her car 's odometer before a trip . The odometer showed that she had traveled 212.3 miles . When she stopped for lunch , the odometer read 372 . How many miles had she traveled ?

Output: 159.7

Input: Consider Input: Tessa has 4 apples . Anita gave her 5 more . She needs 10 apples to make a pie . Does she have enough to make a pie ?

Output: 9

Input: Consider Input: Aaron starts with 81 erasers . He gives 34 to Doris . How many erasers does Aaron end with ?
Output: 47