A flower garden is shaped like a circle. Its radius is 20 yd. A ring-shaped path goes around the garden. The width of the path is 6 yd. The gardener is going to cover the path with sand. If one bag of sand can cover 7 yd', 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 1.)