Alright, let's work through 3455 times 6278 step by step
3455 × 6278 = 6278 × (3455)
+ 6278 × 5 that is equal 31390
+ 6278 × 50 resulting in 313900
+ 6278 × 400 yielding 2511200
+ 6278 × 3000 producing 18834000

= 21690490
