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: Megan baked 71 cupcakes for her school 's bake sale . If her brother , Todd , ate 43 of them how many packages could she make if she put 7 cupcake in each package ?

Output: 4

Input: Consider Input: Dave bought 12 boxes of chocolate candy and gave 5 to his little brother . If each box has 3 pieces inside it , how many pieces did Dave still have ?

Output: 21

Input: Consider Input: A teacher had 7 worksheets to grade . If she graded 2 , but then another 46 were turned in , how many worksheets would she have to grade ?
Output: 51