We're going to solve 8439 multiplied by 2415
8439 × 2415 = 2415 × (8439)
+ 2415 × 9 resulting in 21735
+ 2415 × 30 giving us 72450
+ 2415 × 400 resulting in 966000
+ 2415 × 8000 that is equal 19320000

= 20380185
