Alright, let's work through 2904 times 1643 step by step
2904 × 1643 = 1643 × (2904)
+ 1643 × 4 which equals 6572
+ 1643 × 00 what gives us 0
+ 1643 × 900 resulting in 1478700
+ 1643 × 2000 producing 3286000

= 4771272
