Draw the largest circle in a rectangle with a length of 12 cm and a width of 8 cm. What is the circumference of the circle in cm?
在长12厘米，宽8厘米的长方形中画一个最大的圆，圆的周长是多少厘米．
<gadget id="calculator">3.14 * 8</gadget>
<output>25.12</output>

<result>25.12</result>