We're going to solve 3945 multiplied by 1102
3945 × 1102 = 1102 × (3945)
+ 1102 × 5 that results in 5510
+ 1102 × 40 that results in 44080
+ 1102 × 900 which equals 991800
+ 1102 × 3000 which equals 3306000

= 4347390
