Let's calculate 6821 x 4172
6821 × 4172 = 4172 × (6821)
+ 4172 × 1 resulting in 4172
+ 4172 × 20 that results in 83440
+ 4172 × 800 resulting in 3337600
+ 4172 × 6000 that is equal 25032000

= 28457212
