Polygon ABCDEFGHIJKL represents a bus route with vertices A (2, 3), B (2, 7), C (4, 7), D (4, 9), E (9, 9), F (9, 5), G (7, 5), H (7, 0), I (5, 0), J (5, 5), K (4, 5), and L (4, 3). Each grid square represents 4 square miles. What is the longest distance, in miles, from station K to station E using the bus route?