Let's calculate 2643 x 6907
2643 × 6907 = 6907 × (2643)
+ 6907 × 3 what gives us 20721
+ 6907 × 40 resulting in 276280
+ 6907 × 600 that is equal 4144200
+ 6907 × 2000 resulting in 13814000

= 18255201
