Alright, let's work through 3582 times 5621 step by step
3582 × 5621 = 5621 × (3582)
+ 5621 × 2 that equals 11242
+ 5621 × 80 resulting in 449680
+ 5621 × 500 producing 2810500
+ 5621 × 3000 that is equal 16863000

= 20134422
