John takes 3 naps a week.  Each nap is 2 hours long.  In 70 days how many hours of naps does he take?
There are 70/7=
<gadget id="calculator">70/7</gadget>
<output>10</output>
10 weeks in 70 days.
So he takes 10*3=
<gadget id="calculator">10*3</gadget>
<output>30</output>
30 naps.
That means he naps for 30*2=
<gadget id="calculator">30*2</gadget>
<output>60</output>
60 hours.

<result>60</result>