Tentukan KPK dan FPB dari bilangan 80 dan 108

80 = 2^4 × 5
108 = 2^2 × 3^3
KPK = 2^4 × 3^3 × 5 = ( 16 × 27 ) × 5 = 432 × 5 = 2.160
FPB = 2^2 = 2 × 2 = 4