Jack decides to visit a museum 150 miles from home.  He drives 75 mph there and back.  He spends 6 hours at the museum.  How long is he gone from home?
He drove a total of 150+150=
<gadget id="calculator">150+150</gadget>
<output>300</output>
300 miles.
So he drove for 300/75=
<gadget id="calculator">300/75</gadget>
<output>4</output>
4 hours.
That means he was gone from home for 4+6=
<gadget id="calculator">4+6</gadget>
<output>10</output>
10 hours.

<result>10</result>