Let's calculate 6643 x 5633
6643 × 5633 = 5633 × (6643)
+ 5633 × 3 that is equal 16899
+ 5633 × 40 resulting in 225320
+ 5633 × 600 that results in 3379800
+ 5633 × 6000 that equals 33798000

= 37420019
