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: a company was offering a special on cell phones for $ 2 each . but only if you spent 7 dollars a month for 4 months . how much would it end up costing you total if you bought 1 phone ?
Example Output: 30

Example Input: i have 80 cents to buy candy . if each gumdrop costs 4 cents how many gumdrops can i buy ?
Example Output: 20

Example Input: the ring toss game at the carnival made 420 dollars in 3 days . if they made the same amount of money each day how much did they make per day ?
Example Output:
140