Alright, let's work through 3453 times 6657 step by step
3453 × 6657 = 6657 × (3453)
+ 6657 × 3 resulting in 19971
+ 6657 × 50 producing 332850
+ 6657 × 400 resulting in 2662800
+ 6657 × 3000 producing 19971000

= 22986621
