A ping pong ball falls from a high place, and the height of each bounce is (2/5) of the height of the drop. If a ping pong ball is dropped from a height of 15 meters, what is the height of its second bounce?
一只乒乓球从高处下落，每次弹起的高度是下落高度的(2/5)．如果一只乒乓球从15米的高处下落，他第二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">15 * (2/5) * (2/5)</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>