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: Zoe had 42 bottles of water in her fridge . If she drank 25 of them and then bought 30 more , how many bottles would she have ?
Example Output: 47

Example Input: A neighborhood grocer sells a mix of chocolate and carob candy . The chocolate cost 2.7 dollars a pound and the carob costs 2.55 dollars a pound . If 20 pounds of the chocolate and 40 pounds of the carob candy are used , what is the cost per pound of the mixture in dollars ?
Example Output: 2.6

Example Input: Sara has 9 dozen golf balls . How many golf balls does she have ?
Example Output:
108