Alright, let's work through 2840 times 5489 step by step
2840 × 5489 = 5489 × (2840)
+ 5489 × 0 that results in 0
+ 5489 × 40 that equals 219560
+ 5489 × 800 what gives us 4391200
+ 5489 × 2000 giving us 10978000

= 15588760
