To find the total area available for printing, we need to subtract the area of the margins from the total area of the pages.

The total area of the pages can be calculated by multiplying the length and width of each page and then multiplying by the number of pages: Total area of pages = (20 cm - 2 * 2.5 cm) * (14 cm - 2 * 2 cm) * 360 pages

Simplifying this expression: Total area of pages = (20 cm - 5 cm) * (14 cm - 4 cm) * 360 pages Total area of pages = 15 cm * 10 cm * 360 pages

Now, we can calculate the total area available for printing: Total area available for printing = Total area of pages - Total area of margins Total area available for printing = 15 cm * 10 cm * 360 pages - (2 * 2.5 cm * 14 cm + 2 * 2 cm * 20 cm) * 360 pages

Simplifying this expression: Total area available for printing = 15 cm * 10 cm * 360 pages - (5 cm * 14 cm + 4 cm * 20 cm) * 360 pages Total area available for printing = 15 cm * 10 cm * 360 pages - (70 cm² + 80 cm²) * 360 pages Total area available for printing = 15 cm * 10 cm * 360 pages - 150 cm² * 360 pages

Now, we can calculate the final answer: Total area available for printing = 150 cm² * 360 pages Total area available for printing = 54000 cm²

Therefore, the total area available for printing is 54000 cm².