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: There was a stack of 700 sheets of used paper . Lexie wants to place it in boxes for recycling . If every box can contain 100 sheets , how many boxes does Lexie need ?
Example Output: 7

Example Input: Cody had 45 dollars . For his birthday he got 9 more dollars but spent 19 on a new game . How much money does he have now ?
Example Output: 35

Example Input: Fred has 5 yellow balloons , Sam has 6 yellow balloons , and Mary has 7 yellow balloons . The balloons cost 5 dollars . How many yellow balloons do they have in total ?
Example Output:
18