Q: Marco uses a fifth of an ounce of dry tea leaves to brew his morning cup of tea each day. He buys tea leaves in boxes of 28 ounces. How many weeks of daily tea does Marco get from a box?
A: Marco gets 28 / 1 / 5 = 28 * 5 = 140 cups of tea from a box. At 7 days a week, Marco gets 140 / 7 = 20 weeks of daily tea from a box. The answer is 20.

Q: James wants to learn to become a chess grandmaster. It takes 2 hours to learn the rules. It then takes him 49 times that long to get a level of proficiency to start playing in local tournaments. After that, he devotes his life to chess and spends 100 times as much as the combined time to get proficient to becoming a master. How much total time did he spend?
A: It takes him 2 * 49 = 98 hours to go from knowing how to play to proficient. So he spends 98 + 2 = 100 hours combined on those. So it takes him 100 * 100 = 10,000 hours to become a master from proficient. So the total time was 100 + 10000 = 10,100 hours. The answer is 10100.

Q: A 26-mile circular marathon has four checkpoints inside it. The first is one mile from the start line, and the last checkpoint is one mile from the finish line. The checkpoints have equal spacing between them. How many miles apart are each of the consecutive checkpoints between the start-finish line?
A:
The checkpoints are 1 mile from the start and finish, so they are spaced along 26 - 1 - 1 = 24 miles. There are 4 equally spaced checkpoints, so the checkpoints are 24 / 4 = 6 miles apart. The answer is 6.