There is a circular flower bed with a diameter of 8 meters in the center of the Heroes Square. A road with a width of 2 meters is paved around the flower bed. What is the area of the road?
英雄广场中心有一个直径为8米的圆形花坛，在花坛的四周铺上2米宽的路，路的面积是多少？
<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>