A piece of rectangular paper is 8 decimeters long and 6 decimeters wide, cut it into the largest circle, what is the area of this circle in square decimeters?
一张长方形纸的长是8分米，宽是6分米，把它剪成一个最大的圆，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>