ball falls freely from a high place, and the height of each bounce is (2/5) of the height of the previous drop. If the ball falls from 75 meters, what is the height of the fifth bounce?
球从高处向下自由落下，每次弹起的高度是前次下落高度的(2/5)，如果球从75米处落下，第五次弹起的高度是多少米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) ** 5</gadget>
<output>32/3_125 = around 0.01024</output>

<gadget id="calculator">75 * (32/3_125)</gadget>
<output>96/125 = around 0.768</output>

<result>96/125 = around 0.768</result>