Alright, let's work through 2431 times 6467 step by step
2431 × 6467 = 6467 × (2431)
+ 6467 × 1 yielding 6467
+ 6467 × 30 giving us 194010
+ 6467 × 400 that equals 2586800
+ 6467 × 2000 which equals 12934000

= 15721277
