We're going to solve 2558 multiplied by 7713
2558 × 7713 = 7713 × (2558)
+ 7713 × 8 what gives us 61704
+ 7713 × 50 what gives us 385650
+ 7713 × 500 what gives us 3856500
+ 7713 × 2000 giving us 15426000

= 19729854
