Alright, let's work through 7863 times 812 step by step
7863 × 812 = 812 × (7863)
+ 812 × 3 resulting in 2436
+ 812 × 60 yielding 48720
+ 812 × 800 yielding 649600
+ 812 × 7000 producing 5684000

= 6384756
