Alright, let's work through 6687 times 8091 step by step
6687 × 8091 = 8091 × (6687)
+ 8091 × 7 yielding 56637
+ 8091 × 80 producing 647280
+ 8091 × 600 that results in 4854600
+ 8091 × 6000 which equals 48546000

= 54104517
