Jane is looking at a tree. At the same time, the tree and Jane are casting shadows - the tree of 10 meters and Jane of 0.5 meters. Jane is 1.5 meters tall. How tall is the tree?
The shadow of Jane is 1.5 / 0.5 = 
<gadget id="calculator">1.5/0.5</gadget>
<output>3</output>
3 times smaller than her height.
The height of the tree is therefore 3 times bigger than the shadow, so it's 3 * 10 = 
<gadget id="calculator">3*10</gadget>
<output>30</output>
30 meters tall.

<result>30</result>