We're going to solve 2555 multiplied by 8399
2555 × 8399 = 8399 × (2555)
+ 8399 × 5 which equals 41995
+ 8399 × 50 that is equal 419950
+ 8399 × 500 producing 4199500
+ 8399 × 2000 which equals 16798000

= 21459445
