The sum of the circumference and diameter of a circle is 82.8 cm, what is the area of the circle?
一个圆的周长与直径的和是82.8厘米，这个圆的面积是多少？
<gadget id="calculator">6.28 + 2</gadget>
<output>8.28</output>

<gadget id="calculator">82.8 / 8.28</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

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

<result>314</result>