Let's calculate 6421 x 3450
6421 × 3450 = 3450 × (6421)
+ 3450 × 1 that is equal 3450
+ 3450 × 20 that equals 69000
+ 3450 × 400 resulting in 1380000
+ 3450 × 6000 that results in 20700000

= 22152450
