We're going to solve 2989 multiplied by 4389
2989 × 4389 = 4389 × (2989)
+ 4389 × 9 which equals 39501
+ 4389 × 80 giving us 351120
+ 4389 × 900 giving us 3950100
+ 4389 × 2000 what gives us 8778000

= 13118721
