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: the kids from oakwood elementary school are visiting a bird zoo for their field trip . to get to the bird zoo from the school the kids have to ride some buses . if there are 7 buses and each bus has 3 adult supervisors to guide the children how many supervisors are there in total ?
Example Output: 21

Example Input: sarah is making bead necklaces . she has 945 beads and is making 7 necklaces with each necklace using the same number of beads . how many beads will each necklace use ?
Example Output: 135

Example Input: mark dean 's friend decided to go for a boat ride . if the ride costs $ 8 for every mile and they travelled for 40 miles how much would the ride cost mark ?
Example Output:
320