Alright, let's work through 2840 times 5776 step by step
2840 × 5776 = 5776 × (2840)
+ 5776 × 0 that is equal 0
+ 5776 × 40 resulting in 231040
+ 5776 × 800 resulting in 4620800
+ 5776 × 2000 that results in 11552000

= 16403840
