We're going to solve 4889 multiplied by 2487
4889 × 2487 = 2487 × (4889)
+ 2487 × 9 what gives us 22383
+ 2487 × 80 yielding 198960
+ 2487 × 800 what gives us 1989600
+ 2487 × 4000 what gives us 9948000

= 12158943
