Q: Martin spends 2 hours waiting in traffic, then four times that long trying to get off the freeway. How much time does he waste total?
A: First find the total amount of time he spends trying to get off the freeway: 2 hours * 4 = 8 hours. Then add the time he spends waiting in traffic to find the total time: 8 hours + 2 hours = 10 hours. The answer is 10.
Question: There are 110 calories in a serving of cheese. Rick buys the large blocks that have 16 servings per block. If Rick has already eaten 5 servings of cheese, how many calories are remaining in the block?
Answer: The block has 16 servings and he has eaten 5 servings leaving 16 - 5 = 11 servings of cheese. There are 11 servings of cheese left and each serving is 110 calories for a total of 11 * 110 = 1,210 calories. The answer is 1210.
[Question]A portable computer drive has enough kilobytes of storage space to store 2000 photos. Each photo is 1.5 kilobytes in size. How many 200-kilobyte videos can it store if it already has 400 photos on it?
[Answer]The drive has 1.5 * 2000 = 3000 kilobytes of storage space. It already has 1.5 * 400 = 600 kilobytes of storage space taken up. Thus, it has 3000 - 600 = 2400 kilobytes of space left. The portable drive can store 2400 / 200 = 12 200 - kilobyte videos on it with 400 photos. The answer is 12.
Q: Georgie needs 3 avocados to make her grandmother's guacamole recipe. If she already had 5 avocados and her sister buys another 4 avocados, how many servings of guacamole can Georgie make?
A: Altogether, Georgie has 5 + 4 = 9 avocados. She can make 9 / 3 = 3 servings of guacamole. The answer is 3.
Question: Mr Julien's store has 400 marbles remaining after the previous day's sales. Twenty customers came into the store, and each bought 15 marbles. How many marbles remain in the store?
Answer: If each of the 20 customers bought 15 marbles, then they bought 20 * 15 = 300 marbles in total from Mr Julien's store. The number of marbles remaining in the store is 400 - 300 = 100 marbles. The answer is 100.
Q: Autumn was constantly misplacing her pencils. At the start of the school year, she purchased a pack of 20 pencils. In the first month of school, she misplaced 7 pencils, broke 3 pencils and had to throw them away, she found 4, and bought 2. How many pencils did Autumn have left?
A:

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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Autumn misplaced 7 and broke 3, so that lost her 7 + 3 = 10 pencils. Autumn found 4 pencils and bought 2, so she gained 4 + 2 = 6 pencils. She started with 20 pencils, lost 10 and gained 6 so she had 20 - 10 + 6 = 16 pencils left. The answer is 16.