The circumference of biscuit box = 18X2+ 18X2 = 72cm, and the joint = 1x2 = 2cm, then the trademark length is 72+2 = 74cm.

The height of the biscuit box is 12 cm, which is just the width of the trademark.

Then the area of the trademark = length x width = 74x12 = 888cm2.