A circular flower bed in the Sunshine Community is now building a 2-meter-wide gravel road along its outside. It is known that the diameter of the flower bed is 8 meters. What is the area of the gravel road in square meters?
阳光小区的一个圆形花坛，现在沿着它的外边修一条宽2米的石子路，已知花坛的直径是8米．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>