Alright, let's work through 8421 times 5399 step by step
8421 × 5399 = 5399 × (8421)
+ 5399 × 1 producing 5399
+ 5399 × 20 resulting in 107980
+ 5399 × 400 that results in 2159600
+ 5399 × 8000 what gives us 43192000

= 45464979
