Alright, let's work through 6399 times 6293 step by step
6399 × 6293 = 6293 × (6399)
+ 6293 × 9 that equals 56637
+ 6293 × 90 that equals 566370
+ 6293 × 300 that results in 1887900
+ 6293 × 6000 producing 37758000

= 40268907
