Cut a square piece of paper with a side length of 6 cm into the largest circle, what is the circumference of this circle in cm?
把一张边长为6厘米的正方形纸片剪成一个最大的圆，这个圆的周长是多少厘米？
<gadget id="calculator">3.14 * 6</gadget>
<output>18.84</output>

<result>18.84</result>