There is a circular flower bed with a radius of 3 meters in the Qiting Garden, and now a 1-meter-wide gravel road will be paved around the flower bed so that people can enjoy the flowers. What is the area of this gravel road in square meters?
栖庭花苑内有一个半径为3米的圆形花坛，现要在花坛的一周铺上一条l米宽的石子路，好让人们来赏花．这条石子路的面积是多少平方米？
<gadget id="calculator">3.14 * 5</gadget>
<output>15.7</output>

<result>15.7</result>