aa
203x23=(200+3)x23=200x23+3x23=4600+69=466925x75x4=25x4x75=100x75=750038x27+27x62=27x(38+62)=27x100=2700
=200×23+3×23=4600+69=4669=25×4×75=100×75=7500=(38+62)×27=100×27=2700