The circumference of a flower bed is 12.56 meters, can you find out the area of this circular flower bed?
一个花坛的周长是12.56米，你能求出这个圆形花坛的面积有多大？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<result>12.56</result>