The circumference of a circular flowerbed is 18.84 meters, use half of it to plant roses. How many square meters is the planting area?
一个圆形花圃的周长是18.84米，用它的一半种月季．种月季的面积是多少平方米？
<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>

<gadget id="calculator">28.26 / 2</gadget>
<output>14.13</output>

<result>14.13</result>