There is a circular fish pond with a diameter of 8 meters in a certain community. There is a gravel road with a width of 2 meters around the fish pond. What is the area of this gravel road in square meters?
某小区有一个直径是8米的圆形养鱼池，围着养鱼池有一条宽2米的石子路，这条石子路的面积是多少平方米？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

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

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

<gadget id="calculator">36 - 16</gadget>
<output>20</output>

<gadget id="calculator">3.14 * 20</gadget>
<output>62.8</output>

<result>62.8</result>