The hour hand of an alarm clock is 6 cm long. After a day and night, how many centimeters does the tip of the hour hand travel?
一个闹钟时针长6厘米，经过一昼夜，时针的尖端走过多少厘米．
<gadget id="calculator">3.14 * 6 * 2 * 2</gadget>
<output>75.36</output>

<result>75.36</result>