The minute hand of a small alarm clock is 4 cm long, from 12:00 to 18:00, how many centimeters does the tip of the minute hand travel?
一个小闹钟的分针长4厘米，从12：00整走到18：00整，分针的针尖走过多少厘米的距离．
<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 * 6</gadget>
<output>150.72</output>

<result>150.72</result>