You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.

Example Input: For the fifth grade play , the chairs have been put into 27 rows with 16 chairs in each row . How many chairs have been put out for the play ?
Example Output: 432

Example Input: Cody is 14 years old . His grandmother is 6 times as old as he is . How old is Cody ’ s grandmother ?
Example Output: 84

Example Input: A restaurant served 7 slices of pie during lunch and 5 during dinner today . It served 8 of them yesterday . How many slices of pie were served today ?
Example Output:
12