Divide a circle into several equal parts, then cut it, and assemble it into an approximate rectangle. The length of the rectangle is known to be 40.82cm. What is the area of the circle in cm**2.
把一个圆平均分成若干份，然后把它剪开，拼成一个近似的长方形，已知长方形的长是40.82cm，这个圆的面积是多少cm**2．
<gadget id="calculator">40.82 / 3.14</gadget>
<output>13</output>

<gadget id="calculator">13 ** 2</gadget>
<output>169</output>

<gadget id="calculator">3.14 * 169</gadget>
<output>530.66</output>

<result>530.66</result>