The hour hand of a wall clock is 8 cm long. How many cm does the tip of the hour hand move in a day and night?
一个挂钟的时针长8cm，一昼夜这根时针的尖端走了多少cm．
<gadget id="calculator">3.14 * 8 * 2 * 2</gadget>
<output>100.48</output>

<result>100.48</result>