There is a piece of rectangular paper with a length of 3 decimeters and a width of 2 decimeters. Cut it into the largest circle. What is the circumference of this circle in decimeters?
有一张长3分米，宽2分米的长方形纸，用它剪成一个最大的圆，这个圆的周长是多少分米．
<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>