Let's calculate 6523 x 6638
6523 × 6638 = 6638 × (6523)
+ 6638 × 3 that is equal 19914
+ 6638 × 20 that results in 132760
+ 6638 × 500 resulting in 3319000
+ 6638 × 6000 which equals 39828000

= 43299674
