Cut out the largest circle in a piece of rectangular paper with a length of 8 cm and a width of 6 cm. What is the circumference of the circle in cm?
在一张长8cm，宽6cm的长方形纸内剪一个最大的圆，圆的周长是多少cm
<gadget id="calculator">3.14 * 6</gadget>
<output>18.84</output>

<result>18.84</result>