The Music Fountain in People's Park is a circle with a circumference of 37.68 meters, and there is a circular green belt with a width of 1 meter around it. How many square meters is the area of the green belt?
人民公园音乐喷泉是一个周长为37.68米的圆，在它的周围有一条1米宽的环形绿化带，绿化带的面积是多少平方米？
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">37.68 / 6.28</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">49 - 36</gadget>
<output>13</output>

<gadget id="calculator">3.14 * 13</gadget>
<output>40.82</output>

<result>40.82</result>