Alright, let's work through 1668 times 3555 step by step
1668 × 3555 = 3555 × (1668)
+ 3555 × 8 resulting in 28440
+ 3555 × 60 resulting in 213300
+ 3555 × 600 producing 2133000
+ 3555 × 1000 what gives us 3555000

= 5929740
