There is a circular flower bed with a radius of 10 meters. How many meters will it take to walk around the flower bed at least?
有一个圆形花坛，它的半径是10米，绕这个花坛走一圈至少会走多少米？
<gadget id="calculator">2 * 3.14 * 10</gadget>
<output>62.8</output>

<result>62.8</result>