Calculate the total area of the floor plan shown in the image, assuming all dimensions are in millimeters.

The image provided is a floor plan with various dimensions. Since no specific question is asked, I will calculate the total area of the floor plan based on the given dimensions. All dimensions are assumed to be in millimeters (mm).

To calculate the total area, I will break down the floor plan into distinct rectangular regions and sum their areas.

Step 1: Calculate the area of the top row of rooms.
There are five rooms in the top row, all with a height of 4200 mm.

• Leftmost room: $4500 \text{ mm} \times 4200 \text{ mm}$ Area = $4500 \times 4200 = 18,900,000 \