Divide a circular piece of paper into several equal parts, cut them and assemble them into an approximate rectangle. The perimeter of the rectangle is known to be 66.24 decimeters. What is the area of this circle in square decimeters?
把一个圆形纸片分成若干等份，剪开后拼成一个近似的长方形，已知长方形的周长是66.24分米．这个圆的面积是多少平方分米？
<gadget id="calculator">1 + 3.14</gadget>
<output>4.14</output>

<gadget id="calculator">66.24 / 2 / 4.14</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<result>200.96</result>