Alright, let's work through 8426 times 6423 step by step
8426 × 6423 = 6423 × (8426)
+ 6423 × 6 yielding 38538
+ 6423 × 20 which equals 128460
+ 6423 × 400 that is equal 2569200
+ 6423 × 8000 that results in 51384000

= 54120198
