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.

Input: Consider Input: Katie had 7 pages of math homework and 3 pages of reading homework . If each page had 9 problems on it , how many problems did she have to complete total ?

Output: 90

Input: Consider Input: During 1 year , the Wagners ' real estate bill included 600 dollars for local schools . Of this amount , 150 dollars went to the high school district . What percent did the Wagner family pay to the high school district ?

Output: 25

Input: Consider Input: Roger had 25 books . If he sold 21 of them and used the money he earned to buy 30 new books , how many books would Roger have ?
Output: 34