Abox is 12 centimeters wide ,12 centimeters long, and 15 centimeters tall. what is the total surface area of 4 such boxes?

First you want to find the surface area of one box
SA=2(l*w)+2(h*l)+2(h*w)
SA=2(12*12)+2(15*12)+2(15*12)
SA=2(144)+2(180)+2(180)
SA=288+360+360
SA=1008 cm² is for one box
Multiply by 4 to get for 4 boxes
4*1008=4032 cm²

Figure it out your self