Alright, let's work through 6623 times 6921 step by step
6623 × 6921 = 6921 × (6623)
+ 6921 × 3 yielding 20763
+ 6921 × 20 resulting in 138420
+ 6921 × 600 producing 4152600
+ 6921 × 6000 that results in 41526000

= 45837783
