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]: Edward bought 79 tickets at the state fair . He spent 23 tickets at the ' dunk a clown ' booth and decided to use the rest on rides . If each ride cost 7 tickets , how many rides could he go on ?
[EX A]: 8

[EX Q]: For Halloween Sarah received 66 pieces of candy from neighbors and 15 pieces from her older sister . If she only ate 9 pieces a day , how long would the candy last her ?
[EX A]: 9

[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