Alright, let's work through 8557 times 4831 step by step
8557 × 4831 = 4831 × (8557)
+ 4831 × 7 yielding 33817
+ 4831 × 50 giving us 241550
+ 4831 × 500 which equals 2415500
+ 4831 × 8000 resulting in 38648000

= 41338867
