round clock, the minute hand is 20 cm long, the minute hand goes from 12 to 6, how many meters does the tip of the minute hand travel?
一圆形钟表，分针长20厘米，分针从12走到6，分针尖端走过的路程是多少米？
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 20 * 1</gadget>
<output>62.8</output>

<gadget id="calculator">62.8 / 100</gadget>
<output>0.628</output>

<result>0.628</result>