Alright, let's work through 2643 times 5077 step by step
2643 × 5077 = 5077 × (2643)
+ 5077 × 3 resulting in 15231
+ 5077 × 40 that results in 203080
+ 5077 × 600 that results in 3046200
+ 5077 × 2000 yielding 10154000

= 13418511
