There is a circular flower bed with a diameter of 6 meters. A 2-meter-wide cobblestone path is to be paved around it. What is the area of this path in square meters?
有一圆形花坛，直径6米，要在它周围铺一条2米宽的鹅卵石小路，这条小路的面积是多少平方米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">25 - 9</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<result>50.24</result>