Outside a circular flower bed with a radius of 3 meters, build a path with a width of 1 meter around it, what is the area of this path in square meters?
在一个半径为3米的圆形花坛外，围绕一周修一条1米宽的小路，这条小路的面积是多少平方米？
<gadget id="calculator">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>