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

Input: Consider Input: for halloween isabel received 16 pieces of candy from neighbors and 5 pieces from her older sister . if she only ate 3 pieces a day how long would the candy last her ?

Output: 7

Input: Consider Input: a report said that each day the average youtube viewer watches 2 videos with each video lasting 7 minutes . additionally they also watch 3 minutes of ads . according to the report how many minutes total do people spend on youtube ?

Output: 17

Input: Consider Input: mrs. hilt 's favorite first grade classes are baking muffins . mrs. brier 's class bakes 18 muffins mrs. macadams 's class bakes 20 muffins and mrs. flannery 's class bakes 17 muffins . how many muffins does first grade bake in all ?
Output: 55