Draw the largest circle in a rectangle with a length of 4 cm and a width of 3 cm. What is the circumference of this circle in cm?
在一个长4厘米，宽3厘米的长方形内画一个最大的圆，这个圆的周长是多少cm．
<gadget id="calculator">3.14 * 3</gadget>
<output>9.42</output>

<result>9.42</result>