Alright, let's work through 5581 times 4791 step by step
5581 × 4791 = 4791 × (5581)
+ 4791 × 1 that is equal 4791
+ 4791 × 80 which equals 383280
+ 4791 × 500 resulting in 2395500
+ 4791 × 5000 producing 23955000

= 26738571
