Draw the largest circle in a square whose circumference is 32 cm. What is the circumference of this circle?
在一个周长是32厘米正方形里画一个最大的圆，这个圆的周长是多少．
<gadget id="calculator">32 / 4</gadget>
<output>8</output>

<gadget id="calculator">3.14 * 8</gadget>
<output>25.12</output>

<result>25.12</result>