We're going to solve 3423 multiplied by 1129
3423 × 1129 = 1129 × (3423)
+ 1129 × 3 that is equal 3387
+ 1129 × 20 giving us 22580
+ 1129 × 400 resulting in 451600
+ 1129 × 3000 producing 3387000

= 3864567
