Draw the largest circle in a rectangle whose length is 12 cm and width is 8 cm. What is the area of this circle in square centimeters?
在长为12厘米，宽为8厘米的长方形中画一个最大的圆，这个圆的面积是多少平方厘米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<result>50.24</result>