Flower garden shaped like a circle. Its radius is 16 yd. There is a ring-shaped path that goes around the garden. The width of the path is 5 yd. The gardener is going to cover the path with sand. If one bag of sand can cover 6 yd², 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. If necessary, refer to the list of geometry formulas.