Alright, let's work through 1668 times 6386 step by step
1668 × 6386 = 6386 × (1668)
+ 6386 × 8 yielding 51088
+ 6386 × 60 which equals 383160
+ 6386 × 600 yielding 3831600
+ 6386 × 1000 that equals 6386000

= 10651848
