Luis is driving 80 miles in 2 hours. How far will he go in 15 minutes?
Luis drives 80/2 = 
<gadget id="calculator">80/2</gadget>
<output>40</output>
40 miles in 1 hour.
Since there are 60 minutes in 1 hour, then he drives 40/60 = 2/3 of a mile in 1 minute.
So in 15 minutes, he will go 2/3 x 15 = 
<gadget id="calculator">2/3*15</gadget>
<output>10</output>
10 miles far.

<result>10</result>