Alright, let's work through 3877 times 6467 step by step
3877 × 6467 = 6467 × (3877)
+ 6467 × 7 resulting in 45269
+ 6467 × 70 which equals 452690
+ 6467 × 800 yielding 5173600
+ 6467 × 3000 yielding 19401000

= 25072559
