If the circumference of a circle is 62.8 cm, what is the area of the circle in square centimeters?
如果圆的周长是62.8厘米，那么这个圆的面积是多少平方厘米．
<gadget id="calculator">62.8 / 2 / 3.14</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>