Alright, let's work through 2816 times 870 step by step
2816 × 870 = 870 × (2816)
+ 870 × 6 yielding 5220
+ 870 × 10 producing 8700
+ 870 × 800 yielding 696000
+ 870 × 2000 resulting in 1740000

= 2449920
