Alright, let's work through 7863 times 1631 step by step
7863 × 1631 = 1631 × (7863)
+ 1631 × 3 giving us 4893
+ 1631 × 60 yielding 97860
+ 1631 × 800 that equals 1304800
+ 1631 × 7000 yielding 11417000

= 12824553
