Alright, let's work through 1623 times 5799 step by step
1623 × 5799 = 5799 × (1623)
+ 5799 × 3 that is equal 17397
+ 5799 × 20 which equals 115980
+ 5799 × 600 giving us 3479400
+ 5799 × 1000 which equals 5799000

= 9411777
