Alright, let's work through 2159 times 3871 step by step
2159 × 3871 = 3871 × (2159)
+ 3871 × 9 giving us 34839
+ 3871 × 50 which equals 193550
+ 3871 × 100 that results in 387100
+ 3871 × 2000 that is equal 7742000

= 8357489
