There is a circular flower bed in the school. The perimeter of the flower bed is 28.26 meters. How many square meters does this flower bed occupy?
学校有一个圆形花坛，量得花坛的周长为28.26米，这个花坛的占地面积大约多少平方米？
<gadget id="calculator">28.26 / 3.14 / 2</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 ** 2</gadget>
<output>20.25</output>

<gadget id="calculator">3.14 * 20.25</gadget>
<output>63.585</output>

<result>63.585</result>