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.

Input: Consider 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 ?

Output: 12

Input: Consider Input: There are 9 cards . 4 cards more are added . How many are there total ?

Output: 13

Input: Consider Input: Mrs. Hilt impressed 2436 fans at the basketball game on Friday . If the fans were seated in equal groups on 3 sets of bleachers , how many fans were on each set ?
Output: 812