Jack has a grove with 4 trees by 5 trees.  It takes 6 minutes to clean each tree.  He gets help to clean the trees so it only takes half as long.  How many hours did he spend cleaning trees?
There were 4*5=
<gadget id="calculator">4*5</gadget>
<output>20</output>
20 trees to clean.
So it took 20*6=
<gadget id="calculator">20*6</gadget>
<output>120</output>
120 minutes.
That is 120/60=
<gadget id="calculator">120/60</gadget>
<output>2</output>
2 hours.
So he spent 2/2=
<gadget id="calculator">2/2</gadget>
<output>1</output>
1 hour cleaning.

<result>1</result>