Rectangle 1: width = 160 mm, height = 40 mm, area = $A_1 = 160 \times 40 = 6400 mm^2$
Rectangle 2: width = 40 mm, height = 200 mm, area = $A_2 = 40 \times 200 = 8000 mm^2$
Rectangle 3: width = 120 mm, height = 40 mm, area = $A_3 = 120 \times 40 = 4800 mm^2$
Total
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