There is a big tree on the school playground. In order to measure the height of the tree, Xiaolan first measured the length of the tree's shadow to be 8 meters. At the same time, she measured the length of her own shadow to be 2.4 meters. It is known that Xiaolan's height is 1.5 meters. Please help Xiaolan to calculate the height of the tree?
学校操场上有一棵大树，小兰为了测量树的高度，她先量出树影子的长度是8米，同时又量得自己影子的长度是2.4米，已知小兰的身高是1.5米．请你帮小兰同学计算出树的高度？
<gadget id="calculator">1.5 / 2.4</gadget>
<output>0.625</output>

<gadget id="calculator">0.625 * 8</gadget>
<output>5</output>

<result>5</result>