Let's calculate 6399 x 3395
6399 × 3395 = 3395 × (6399)
+ 3395 × 9 that results in 30555
+ 3395 × 90 that is equal 305550
+ 3395 × 300 that results in 1018500
+ 3395 × 6000 giving us 20370000

= 21724605
