The minute hand of a clock is 10 cm long, how many centimeters does the tip of the minute hand travel from 3 o'clock to 4 o'clock?
一个钟表的分针长10厘米，从3时走到4时，分针针尖走过了多少厘米．
<gadget id="calculator">3.14 * 10 * 2</gadget>
<output>62.8</output>

<result>62.8</result>