Alright, let's work through 9959 times 581 step by step
9959 × 581 = 581 × (9959)
+ 581 × 9 what gives us 5229
+ 581 × 50 resulting in 29050
+ 581 × 900 resulting in 522900
+ 581 × 9000 yielding 5229000

= 5786179
