一圆形游泳池如图所示，现在需在其周围建一圆形过道，并在其四周围上栅栏。栅栏价格为35元/米，过道造价为20元/平方米。过道宽度为3米，游泳池半径由键盘输入。要求编程计算并输出过道和栅栏的造价。-(A) a circular pool as shown, and now it takes on its built around a circular aisle, and in its four surrounding the fence. Fences price of 35 yuan/m, aisle a cost of 20 yuan/square meter. Aisle width of 3 m, swimming pool radius from the keyboard input. Calculate and output requires programming aisles and the cost of the fence.