Let's calculate 2605 x 6643
2605 × 6643 = 6643 × (2605)
+ 6643 × 5 that results in 33215
+ 6643 × 00 that results in 0
+ 6643 × 600 resulting in 3985800
+ 6643 × 2000 resulting in 13286000

= 17305015
