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.

Example Input: For homework Amy had 18 math problems and 6 spelling problems . If she can finish 4 problems in an hour how long will it take her to finish all the problems ?
Example Output: 6

Example Input: At a sale , the cost of a pair of shoes was reduced from 42 dollars to 33.6 dollars . What was the percent of discount ?
Example Output: 20

Example Input: A pet shelter had 5 puppies when another 35 were brought in . If 8 puppies a day are adopted , how long would it take for all of them to be adopted ?
Example Output:
5