Alright, let's work through 2840 times 1122 step by step
2840 × 1122 = 1122 × (2840)
+ 1122 × 0 giving us 0
+ 1122 × 40 that results in 44880
+ 1122 × 800 resulting in 897600
+ 1122 × 2000 which equals 2244000

= 3186480
