Cut the largest circle in a rectangle with a length of 4 decimeters and a width of 3 decimeters. What is the circumference of the circle in decimeters?
在一个长4分米，宽3分米的长方形内剪一个最大的圆，圆的周长是多少分米．
<gadget id="calculator">3.14 * 3</gadget>
<output>9.42</output>

<result>9.42</result>