Alright, let's work through 6643 times 3422 step by step
6643 × 3422 = 3422 × (6643)
+ 3422 × 3 yielding 10266
+ 3422 × 40 producing 136880
+ 3422 × 600 yielding 2053200
+ 3422 × 6000 yielding 20532000

= 22732346
