Cut the largest circle out of square paper with a side length of 6 decimeters, what is the area of the cut part in decimeters**2.
用边长为6分米正方形纸剪成一个最大的圆，剪去部分的面积是多少分米**2．
<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<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>

<gadget id="calculator">36 - 28.26</gadget>
<output>7.74</output>

<result>7.74</result>