Alright, let's work through 1554 times 1843 step by step
1554 × 1843 = 1843 × (1554)
+ 1843 × 4 giving us 7372
+ 1843 × 50 what gives us 92150
+ 1843 × 500 which equals 921500
+ 1843 × 1000 giving us 1843000

= 2864022
