At 9 o'clock in the morning, Xiao Ming measured that the shadow length of a 1-meter-high tree was 1.5 meters, and at the same time, the shadow length of another tree was measured to be 27 meters, so how tall is this tree?
早上9点，小明测得一棵1米高的树的影子长1.5米，同时同地测得另一棵树的影子长是27米，那么这棵树高多少米．
<gadget id="calculator">27 / 1.5</gadget>
<output>18</output>

<result>18</result>