A box is 12 cm wide 12 cm long and 15 cm tall what is the total surface area of 4 such boxes

Surface area = 2 (12*12+15*12+15*12) = 1008

1008 * 4 = 4032

(First step):

When finding the area, all we do is to multiply the following numbers of each side of the box.

By multiplying these numbers we then get, 2,160.

(Second step):

We would then want to find how many this would be but, with four boxes. And thefore, it would then be, 8,640 as the area of 4 boxes.