There is a circular flowerbed in the park with a diameter of 8 meters. A 2-meter-wide stone path is built around the flowerbed. What is the area of this stone path in square meters?
公园里有一个圆形花圃，直径是8米，在花圃的周围修一条2米宽的石子路，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>