Area of Grass Without Including Garden Area

A rectangular garden measures 15 meters in length and 10 meters in width. The owner wants to fence the garden and plant grass on the outer border of the garden. If the fencing is to be placed 1 meter away from the garden's edge all around and an additional layer of grass is to be planted 0.5 meters outward from the fence, what will be the total area, in square meters, that will be covered with grass?