The minute hand of the big round clock in the hall is 20 cm long. How many meters does the tip of the needle travel in a day and night?
大厅里的圆形大钟的分针长20厘米，它的针尖一昼夜走过的路程是多少米？
<gadget id="calculator">24 / 100</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">3.14 * 20 * 2 * (6/25)</gadget>
<output>30.144</output>

<result>30.144</result>