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 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: A pet store had 13 puppies . In one day they sold 7 of them and put the rest into cages with 2 in each cage . How many cages did they use ?
Example Output: 3

Example Input: A florist had 5 roses . If she sold 3 of them and then later picked 34 more , how many roses would she have ?
Example Output:
36