Alright, let's work through 2571 times 4089 step by step
2571 × 4089 = 4089 × (2571)
+ 4089 × 1 giving us 4089
+ 4089 × 70 giving us 286230
+ 4089 × 500 what gives us 2044500
+ 4089 × 2000 that equals 8178000

= 10512819
