The length of the hour hand on the clock face is 6 cm, what is the distance traveled by the tip of the hour hand in one day and night?
钟面上时针长6厘米，时针尖端一昼夜所走的路程是多少厘米．
<gadget id="calculator">3.14 * 6 * 2 * 2</gadget>
<output>75.36</output>

<result>75.36</result>