Alright, let's work through 2850 times 2571 step by step
2850 × 2571 = 2571 × (2850)
+ 2571 × 0 yielding 0
+ 2571 × 50 that is equal 128550
+ 2571 × 800 which equals 2056800
+ 2571 × 2000 which equals 5142000

= 7327350
