Use proportion knowledge to answer. Xiao Ming: Now, I stand 1.5 meters tall and my shadow is 0.6 meters long. Xiaoqiang: The tree shadow is 5 meters long, how many meters is the tree height?
用比例知识解答．小明：现在，我站着身高1.5米，影子长0.6米．小强：树影长5米，树高多少米呢？
<gadget id="calculator">1.5 / 0.6</gadget>
<output>2.5</output>

<gadget id="calculator">5 / 2.5</gadget>
<output>2</output>

<result>2</result>