Let's calculate 6699 x 8663
6699 × 8663 = 8663 × (6699)
+ 8663 × 9 which equals 77967
+ 8663 × 90 resulting in 779670
+ 8663 × 600 what gives us 5197800
+ 8663 × 6000 that is equal 51978000

= 58033437
