A table tennis ball is dropped from 25 meters, and the height of each bounce is 40% of the height of the drop. How many meters can it bounce after the second fall?
乒乓球从25米处下落，每次弹起高度是下落高度的40%，它第二次下落后能弹起多少米．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">25 * (2/5) * (2/5)</gadget>
<output>4</output>

<result>4</result>