The hour hand of a clock is 3 cm long, what is the distance traveled by its tip in a day and night in cm?
一座钟的时针长3厘米，它的尖端在一昼夜里走过的路程是多少厘米．
<gadget id="calculator">3.14 * 3 * 2 * 2</gadget>
<output>37.68</output>

<result>37.68</result>