Let's calculate 6429 x 3390
6429 × 3390 = 3390 × (6429)
+ 3390 × 9 what gives us 30510
+ 3390 × 20 that is equal 67800
+ 3390 × 400 that equals 1356000
+ 3390 × 6000 that results in 20340000

= 21794310
