Alright, let's work through 2989 times 6840 step by step
2989 × 6840 = 6840 × (2989)
+ 6840 × 9 that results in 61560
+ 6840 × 80 that results in 547200
+ 6840 × 900 yielding 6156000
+ 6840 × 2000 giving us 13680000

= 20444760
