The ball falls freely from a high place, and the height of each bounce when it touches the ground is 2/5 of the previous one. If the ball falls from a height of 50 meters, how many meters does it bounce for the third time?
皮球从高处自由落下，每次接触地面弹起的高度是前一次的(2/5)，如果皮球从50米高处落下，第三次弹起多米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">50 * (2/5) * (2/5) * (2/5)</gadget>
<output>16/5 = around 3.2</output>

<result>16/5 = around 3.2</result>