There is a circular flower bed with a circumference of 18.84 meters, and a 1-meter-wide gravel path is designed around the flower bed. What is the area of the gravel path?
有一个周长是18.84米的圆形花坛，在花坛的周围设计一条1米宽的石子小路．石子小路的面积是多少？
<gadget id="calculator">18.84 / 3.14 / 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>