Outside a circular flower bed with a diameter of 6 meters, a circular path with a width of 1 meter surrounds it. What is the area of this path in square meters?
在直径是6米的圆形花坛外面，围绕着一条1米宽的环形小路，这条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">3.14 * 16</gadget>
<output>50.24</output>

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

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">50.24 - 28.26</gadget>
<output>21.98</output>

<result>21.98</result>