Alright, let's work through 2643 times 1087 step by step
2643 × 1087 = 1087 × (2643)
+ 1087 × 3 giving us 3261
+ 1087 × 40 which equals 43480
+ 1087 × 600 producing 652200
+ 1087 × 2000 that results in 2174000

= 2872941
