Alright, let's work through 6397 times 6833 step by step
6397 × 6833 = 6833 × (6397)
+ 6833 × 7 producing 47831
+ 6833 × 90 resulting in 614970
+ 6833 × 300 what gives us 2049900
+ 6833 × 6000 giving us 40998000

= 43710701
