A circular flower bed has a radius of 10 meters. If a circular gravel road with a width of 1 meter is to be laid around the flower bed, what is the area of the gravel road in square meters?
一个圆形花坛，半径是10米，如果要给这个花坛的周围铺设一条宽1米的环形石子路，这条石子路的面积是多少平方米？
<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">11 ** 2</gadget>
<output>121</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">121 - 100</gadget>
<output>21</output>

<gadget id="calculator">3.14 * 21</gadget>
<output>65.94</output>

<result>65.94</result>