Let's calculate 6399 x 8373
6399 × 8373 = 8373 × (6399)
+ 8373 × 9 which equals 75357
+ 8373 × 90 which equals 753570
+ 8373 × 300 that results in 2511900
+ 8373 × 6000 which equals 50238000

= 53578827
