The perimeter of a circular flower bed is 18.64m, what is the area of this flower bed in m**2.
一个圆形花坛的周长是18.64m，这个花坛的面积是多少m**2．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>