I just want the upper and lower floors on all sides, and the upper and lower floors of the trash can don't need to be pasted.
Upper lateral area: 66×20×4=5280 (square centimeter).
Transverse area of the lower floor: 46×80×4= 14720 (square centimeter).
Decoration required for 25 garbage cans: (5280+ 14720)×25=500000 (square centimeter)
500,000 square centimeters =50 square meters
Money to be spent: 180×50=9000 yuan.