The minute hand of a clock is 10 cm long, how many cm does the tip of the minute hand travel in 1 hour?
一个钟表的分针长10cm，1小时分针针尖走过了多少cm．
<gadget id="calculator">3.14 * 10 * 2</gadget>
<output>62.8</output>

<result>62.8</result>