A circular flower bed is 6 meters in diameter, and a 1-meter-wide path is built around the flower bed. What is the area of this path in square meters?
一个圆形花坛，直径为6米，沿花坛的周围修一条1米宽的小路．这条小路的面积是多少平方米？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<gadget id="calculator">3.14 * 7</gadget>
<output>21.98</output>

<result>21.98</result>