Build a 3-meter-wide road around a circular flower bed. It is known that the radius of the circular flower bed is 10 meters. What is the area of the road in square meters?
在一个圆形花坛周围修一条3米宽的路，已知圆形花坛的半径是10米，路得面积是多少平方米？
<gadget id="calculator">10 + 3</gadget>
<output>13</output>

<gadget id="calculator">13 ** 2</gadget>
<output>169</output>

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

<gadget id="calculator">169 - 100</gadget>
<output>69</output>

<gadget id="calculator">3.14 * 69</gadget>
<output>216.66</output>

<result>216.66</result>