There is a circular flower bed with a diameter of 10 meters in Greentown Park, and there is a cobblestone road with a width of 2 meters around the flower bed. What is the area of the cobblestone road in square meters?
绿城公园里有一个直径10米的圆形花坛，在花坛的周围有一条2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">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">7 ** 2</gadget>
<output>49</output>

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

<gadget id="calculator">49 - 25</gadget>
<output>24</output>

<gadget id="calculator">3.14 * 24</gadget>
<output>75.36</output>

<result>75.36</result>