There is a circular flower bed with a circumference of 25.12 meters in the garden in the center of the street. A cobblestone road with a width of 1 meter is to be built around the flower bed. What is the area of this cobblestone road in square meters?
街心花园有一个周长是25.12米的圆形花坛，要在花坛的周围修一条1米宽的鹅卵石路，这条鹅卵石路的面积是多少平方米？
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

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

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>