The circumference of a circular vegetable garden is 62.8 meters. What is the area of the vegetable garden in square meters?
一个圆形菜园的周长是62.8米，这个菜园的占地面积为多少平方米．
<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>