Question: Zack has traveled to twice the number of countries Patrick traveled to. Patrick traveled to three times the number of countries Joseph traveled to. Joseph traveled to half the number of countries George traveled to. If George traveled to 6 countries, how many countries did Zack travel to?
Answer: Joseph traveled to 6 / 2 = 3 countries. Patrick traveled to 3 * 3 = 9 countries. So, Zack traveled to 2 * 9 = 18 countries. The answer is 18.

Question: Mark has a garden with flowers. He planted plants of three different colors in it. Ten of them are yellow, and there are 80% more of those in purple. There are only 25% as many green flowers as there are yellow and purple flowers. How many flowers does Mark have in his garden?
Answer: There are 80 / 100 * 10 = 8 more purple flowers than yellow flowers. So in Mark's garden, there are 10 + 8 = 18 purple flowers. Purple and yellow flowers sum up to 10 + 18 = 28 flowers. That means in Mark's garden there are 25 / 100 * 28 = 7 green flowers. So in total Mark has 28 + 7 = 35 plants in his garden. The answer is 35.

Question: Dorothy earns $60000 a year from her work. She needs to pay 18% of this amount in taxes. How much money will she have left after she pays the taxes?
Answer: The amount in taxes Dorothy needs to pay is 18 / 100 * 60000 = $10800. So she is going to be left with 60000 - 10800 = $49200. The answer is 49200.

Question: Mr. Resty has two identical 4-story buildings. The first floor has 2 apartment units while the rest of the floors have 5 apartment units on each floor. How many apartment units does Mr. Resty have in all?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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In one building, there are 4 - 1 = 3 floors that have 5 apartment units each. Mr. Resty has a total of 3 floors x 5 units = 15 apartment units from the 2nd to 4th floor in one building. So, in one building, there are a total of 15 + 2 = 17 apartment units. Therefore, Mr. Resty has a total of 17 x 2 = 34 apartment units in his 2 buildings. The answer is 34.