Alright, let's work through 3871 times 2561 step by step
3871 × 2561 = 2561 × (3871)
+ 2561 × 1 producing 2561
+ 2561 × 70 giving us 179270
+ 2561 × 800 yielding 2048800
+ 2561 × 3000 that is equal 7683000

= 9913631
