Let's calculate 6421 x 8522
6421 × 8522 = 8522 × (6421)
+ 8522 × 1 which equals 8522
+ 8522 × 20 resulting in 170440
+ 8522 × 400 what gives us 3408800
+ 8522 × 6000 that results in 51132000

= 54719762
