The hour hand of the big clock on the clock tower is 1 meter long. How many meters does the tip of the hour hand move in a day and night?
钟楼上的大钟时针长1米，时针针尖一昼夜走了多少米？
<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>