A circular flowerbed has a circumference of 18.84 meters. How many square meters does this flower garden occupy?
一个圆形花圃，它的周长是18.84米．这个花圃的占地面积是多少平方米？
<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>

<result>28.26</result>