The minute hand of a clock is 6 cm long and the hour hand is 5 cm long. When the hour hand rotates once, how many centimeters does the tip of the minute hand travel?
一种座钟的分针长6厘米，时针5厘米．时针旋转一周，分针的尖端走了多少厘米？
<gadget id="calculator">3.14 * 6 * 2 * 12</gadget>
<output>452.16</output>

<result>452.16</result>