The radius of a circular flower bed is 2.5 meters, and a gravel path with a width of 0.5 meters is paved around the flower bed. What is the area of the path in m**2. (π takes 3.14)
一个圆形花坛的半径是2.5米，在花坛一周铺上了一条宽0.5米的碎石小路，小路的面积是多少m**2．(π取3.14)
<gadget id="calculator">2.5 + 0.5</gadget>
<output>3</output>

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

<gadget id="calculator">2.5 ** 2</gadget>
<output>6.25</output>

<gadget id="calculator">9 - 6.25</gadget>
<output>2.75</output>

<gadget id="calculator">3.14 * 2.75</gadget>
<output>8.635</output>

<result>8.635</result>