Diana needs to bike 10 miles to get home.  She can bike 3 mph for two hours before she gets tired, and she can bike 1 mph until she gets home.  How long will it take Diana to get home?
In the first part of her trip, Diana will cover 2 hours * 3 mph = 
<gadget id="calculator">2*3</gadget>
<output>6</output>
6 miles.
In the second part of her trip, Diana will need to cover an additional 10 miles - 6 miles = 
<gadget id="calculator">10-6</gadget>
<output>4</output>
4 miles.
To cover 4 miles * 1 mph = will take Diana 
<gadget id="calculator">4*1</gadget>
<output>4</output>
4 hours.
Total biking time to get home for Diana will be 2 hours + 4 hours = 
<gadget id="calculator">2+4</gadget>
<output>6</output>
6 hours.

<result>6</result>