circus uses a 62.8-meter-long canvas to form a circular performance venue. What is the area of the performance venue in square meters?
一个马戏团用62.8米长的帆布围成一个圆形的表演场地．这个表演场地的面积是多少平方米？
<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>