Alright, let's work through 4499 times 6443 step by step
4499 × 6443 = 6443 × (4499)
+ 6443 × 9 what gives us 57987
+ 6443 × 90 yielding 579870
+ 6443 × 400 which equals 2577200
+ 6443 × 4000 which equals 25772000

= 28987057
