The area of the window is about 42.39 square feet
1 feet =12 inches
And 6 inches = 1/2 feet
13 1/2*3.14=42.39 feet²
The area of the window is about 508.68 square inches
1 feet =12 inches
And 13 feet*12= 156 inches
156 inches + 6 inches = 162 inches
Then, 162*3.14=508.68 inches²