The hour hand of a clock is 5 centimeters long, how many centimeters does the tip of the hour hand travel in one day and night?
一种钟表的时针长5厘米，时针尖端一昼夜走过的距离是多少厘米？
<gadget id="calculator">3.14 * 5 * 2 * 2</gadget>
<output>62.8</output>

<result>62.8</result>