Alright, let's work through 2857 times 6915 step by step
2857 × 6915 = 6915 × (2857)
+ 6915 × 7 that is equal 48405
+ 6915 × 50 producing 345750
+ 6915 × 800 yielding 5532000
+ 6915 × 2000 that results in 13830000

= 19756155
