The ball falls freely from a high place, and the height of each bounce when it touches the ground is (2/5) of the height of the fall. If the ball falls from a height of 40 meters, what is the height of the second bounce?
球从高处自由落下，每次接触地面弹起的高度是下落高度的(2/5)，如果球从40米高处落下，那么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">40 * (2/5) * (2/5)</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>