If the donkey walks around a circle with a radius of 1.2m, how many meters will it take?
如果驴绕着一个半径为1.2m的圆走一圈，大约要走多少米？
<gadget id="calculator">3.14 * 1.2 * 2</gadget>
<output>7.536</output>

<result>7.536</result>