Question: At the park, Dimitri saw families riding bicycles and tricycles. Bicycles have two wheels and tricycles have three wheels. 6 adults were riding bicycles and 15 children were riding tricycles.  How many wheels did Dimitri see at the park?
Answer: Dimitri saw 2 x 6 = 12 wheels on the bicycles. He saw 15 x 3 = 45 wheels on the tricycles. He saw a total of 12 + 45 = 57 wheels. The answer is 57.

Question: Carson leans over the railing at the zoo to get the perfect selfie and falls into the combined wombat and rhea enclosure. There are 9 wombats and 3 rheas. If each wombat claws him 4 times and each rhea claws him once, how many times does he get clawed?
Answer: First find the total number of times the wombats claw him: 9 wombats * 4 claws / wombat = 36 claws. Then add the number of times the rheas claw him to find the total: 36 claws + 3 claws = 39 claws. The answer is 39.

Question: Eddie is 92 years old. His granddaughter Becky is currently four times younger than he is. The mother of Becky - Irene, is two times her age. How old is Irene?
Answer: Becky is four times younger than Eddie, which means she is 92 / 4 = 23 years old. Her mother is two times older than she, so it means Irene is 23 * 2 = 46 years old. The answer is 46.

Question: Jack went to a supermarket with $100 and bought 4 bottles of water. Then his mother called him and asked him to buy twice as many bottles as he already bought. Each bottle cost $2. Finally, he also bought half a pound of cheese and 1 pound of cheese costs $10. How much money does Jack have remaining?
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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Jack's mother asked him to buy 2 * 4 = 8 bottles of water. Thus Jack bought 4 + 8 = 12 bottles of water in total. Altogether, the bottles of water cost 12 * $2 = $24. The cheese cost 1 / 2 * $10 = $5. So Jack spent $24 + $5 = $29 on water and cheese. Since he started with $100, he now has $100 - $29 = $71 left. The answer is 71.