101000 = 25*1 + 24*0 + 23*1 + 22*0 + 21*0 + 20*0 = 32 + 0 + 8 + 0 + 0 + 0 = 40
11011 = 24*1 + 23*1 + 22*0 + 21*1 + 20*1 = 16 + 8 + 0 + 2 + 1 = 27
40 x 27 = 1080
