On a piece of rectangular paper with a length of 6 decimeters and a width of 4 decimeters, after cutting out the largest circle, what is the remaining area in square decimeters?
在一张长6分米，宽4分米的长方形纸上，剪下一个最大的圆后，剩下的面积是多少平方分米．
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

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

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">24 - 12.56</gadget>
<output>11.44</output>

<result>11.44</result>