Alright, let's work through 4321 times 1398 step by step
4321 × 1398 = 1398 × (4321)
+ 1398 × 1 resulting in 1398
+ 1398 × 20 that results in 27960
+ 1398 × 300 that results in 419400
+ 1398 × 4000 that is equal 5592000

= 6040758
