Use reasoning to lead to the answer of the following question:
John takes 3 naps a week. Each nap is 2 hours long. In 70 days how many hours of naps does he take?

60
There are 70 / 7 = 10 weeks in 70 days.

So he takes 10 * 3 = 30 naps.

That means he naps for 30 * 2 = 60 hours.

.

Final answer: 60