The area of each side is 18*20=360 (square centimeter), and the area of four sides is 360*4= 1440 (square centimeter).

Another method: the unfolded trademark paper is rectangular, and its length is18 * 4 = 72 (cm) 72 * 20 =1440 (cm 2).

Volume: 18* 18*20=6480 (cubic centimeter)