Let's calculate 3445 x 4215
3445 × 4215 = 4215 × (3445)
+ 4215 × 5 producing 21075
+ 4215 × 40 that is equal 168600
+ 4215 × 400 that results in 1686000
+ 4215 × 3000 that results in 12645000

= 14520675
