The second hand of a big clock on the clock tower is 1 meter long. How many meters does the tip of the second hand travel in one hour?
钟楼上的一只大钟的秒针长1米．这根秒针的尖端一小时要走多少米？
<gadget id="calculator">2 * 3.14 * 1 * 60</gadget>
<output>376.8</output>

<result>376.8</result>