The diameter of a circular lawn in the Yellow River Park is 6 meters, and a 2-meter-wide gravel road is paved around it. How many square meters is the paved path?
黄河公园一块圆形草坪的直径是6米，在它的周围铺一条2米宽的石子路．铺的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>