The hour hand of a wall clock is 6 cm long. What is the distance traveled by the tip of the hour hand in one day and night?
一只挂钟的时针长6cm，一昼夜时针的针尖经过的路程是多少厘米．
<gadget id="calculator">2 * 3.14 * 6 * 2</gadget>
<output>75.36</output>

<result>75.36</result>