London's landmark building - Big Ben is huge and gorgeous. Its hour hand is 2.75m long. How many meters does the tip of the hour hand of Big Ben travel in a day and night?
伦敦标志性建筑--大本钟巨大而华丽，它的时针长度是2.75m，大本钟的时针尖一昼夜走过的路程是多少米？
<gadget id="calculator">2.75 * 2</gadget>
<output>5.5</output>

<gadget id="calculator">3.14 * 5.5 * 2</gadget>
<output>34.54</output>

<result>34.54</result>