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]: Marcia spent 300 minutes working on her science project . How many hours did Marcia spend on her science project ?
[EX A]: 5

[EX Q]: Nancy grew 2 onions , Dan grew 9 onions , and Mike grew 4 onions . They worked for 6 days on the farm . How many onions did they grow in total ?
[EX A]: 15

[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