Alright, let's work through 2643 times 5301 step by step
2643 × 5301 = 5301 × (2643)
+ 5301 × 3 that is equal 15903
+ 5301 × 40 producing 212040
+ 5301 × 600 which equals 3180600
+ 5301 × 2000 producing 10602000

= 14010543
