The diameter of a circular flower bed is 6 meters, what is the area of the flower bed in square meters?
一个圆形花坛的直径是6米，这个花坛的面积是多少平方米？
<gadget id="calculator">6 / 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>