Xiaolan's height is 1.5m, and the length of her shadow is 2.4m. If the shadow of a tree is 4m long at the same time and at the same place, how tall is the tree?
小兰的身高1.5m，她的影子长是2.4m．如果同一时间，同一地点测得一棵树的影子长4m，这棵树有多高？
<gadget id="calculator">1.5 * 4</gadget>
<output>6</output>

<gadget id="calculator">6 / 2.4</gadget>
<output>2.5</output>

<result>2.5</result>