First, get the area of the rectangular yard.
Area = L x W
Area = 16 X 14
Area = 224 square feet
Get the area of the circular fountain.
Area = pi x r^2
Area = 3.1415 x (4/2)^2
Area = 12.57 square feet
Getting grass portion.
224 - 12.57 = (C) 211.43 square feet