circular flower bed has a circumference of 62.8 meters. What is its footprint?
一个圆形的花坛，它的周长是62.8米．它的占地面积是多少？
<gadget id="calculator">62.8 / 3.14 / 2</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>