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

Example Input: A worksheet had 4 problems on it . If a teacher had 9 worksheets to grade and had already graded 5 of them , how many more problems does she have to grade ?
Example Output: 16

Example Input: Sally earns $ 12.5 an hour cleaning houses . If she works for 12 hours , how much money will she make ?
Example Output: 150

Example Input: April 's discount flowers was having a sale where each rose was 4 dollars . If April started with 13 roses and had 4 roses left , how much money did she earn ?
Example Output:
36