Alright, let's work through 6287 times 3666 step by step
6287 × 3666 = 3666 × (6287)
+ 3666 × 7 giving us 25662
+ 3666 × 80 yielding 293280
+ 3666 × 200 yielding 733200
+ 3666 × 6000 resulting in 21996000

= 23048142
