Cut out the largest circle in a rectangular paper with a length of 8 decimeters and a width of 6 decimeters. What is the area of this circle in square decimeters?
在一个长8分米，宽6分米的长方形纸内剪下一个最大的圆，这个圆的面积是多少平方分米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>