A flower garden is shaped like a circle. Its radius is 18yd . A ring-shaped path goes around the garden. The width of the path is 5yd . The gardener is going to cover the path with sand. If one bag of sand can cover 5yd square , how many bags of sand does the gardener need? Note that sand comes only by the bag, so the number of bags must be a whole number. (Use the value 3.14 for pie .)