Alright, let's work through 2431 times 3151 step by step
2431 × 3151 = 3151 × (2431)
+ 3151 × 1 producing 3151
+ 3151 × 30 producing 94530
+ 3151 × 400 that is equal 1260400
+ 3151 × 2000 yielding 6302000

= 7660081
