Connor sleeps 6 hours a night.  His older brother Luke sleeps 2 hours longer than Connor.  Connor’s new puppy sleeps twice as long as Luke.  How long does the puppy sleep?
Luke sleeps 2 hours longer than Connor who sleeps 6 hours so that's 2+6 = 
<gadget id="calculator">2+6</gadget>
<output>8</output>
8 hours.
The new puppy sleeps twice as long as Luke, who sleeps 8 hours, so the puppy sleeps 2*8 = 
<gadget id="calculator">2*8</gadget>
<output>16</output>
16 hours.

<result>16</result>