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.

[EX Q]: A pet store had 12 siamese cats and 20 house cats . During a sale they sold 20 cats . How many cats do they have left ?
[EX A]: 12

[EX Q]: The school cafeteria had 14 apples . If they used 13 to make lunch for the students and then bought 49 more , how many apples would they have ?
[EX A]: 50

[EX Q]: A waiter had 22 customers in his section . If 14 of them left and the rest of his tables had 4 people at each table , how many tables did he have ?
[EX A]:
2