Divide the circle into several equal parts and put together an approximate rectangle. If the perimeter of the rectangle is 82.8 cm, what is the area of the circle in square centimeters?
将圆分成若干等分，拼成一个近似的长方形，如果长方形的周长是82.8厘米，那么圆的面积是多少平方厘米？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<result>314</result>