Alright, let's work through 3399 times 6519 step by step
3399 × 6519 = 6519 × (3399)
+ 6519 × 9 resulting in 58671
+ 6519 × 90 what gives us 586710
+ 6519 × 300 what gives us 1955700
+ 6519 × 3000 giving us 19557000

= 22158081
