A master carpenter needs to inlay a circle of gold borders on the edge of a circular tabletop with a diameter of 1.2 meters. The length of the gold border strips should be at least how many meters.
木匠师傅要把一张直径为1.2米的圆形桌面边上镶上一圈金边，金边条的长至少应有多少米．
<gadget id="calculator">3.14 * 1.2</gadget>
<output>3.768</output>

<result>3.768</result>