We're going to solve 8427 multiplied by 6390
8427 × 6390 = 6390 × (8427)
+ 6390 × 7 producing 44730
+ 6390 × 20 that is equal 127800
+ 6390 × 400 that is equal 2556000
+ 6390 × 8000 yielding 51120000

= 53848530
