Alright, let's work through 4055 times 1643 step by step
4055 × 1643 = 1643 × (4055)
+ 1643 × 5 giving us 8215
+ 1643 × 50 what gives us 82150
+ 1643 × 000 that results in 0
+ 1643 × 4000 what gives us 6572000

= 6662365
