Alright, let's work through 8436 times 6443 step by step
8436 × 6443 = 6443 × (8436)
+ 6443 × 6 what gives us 38658
+ 6443 × 30 resulting in 193290
+ 6443 × 400 which equals 2577200
+ 6443 × 8000 that results in 51544000

= 54353148
