The school wants to lay a circular stone path with a width of 2 meters around a circular flower bed with a circumference of 62.8 meters. Please calculate the area of this path.
学校想在一个周长是62.8米的圆形花坛的周围，铺设一条宽2米的环形石子小路，请你算一下这条小路的面积．
<result>138.15</result>