Alright, let's work through 5580 times 3780 step by step
5580 × 3780 = 3780 × (5580)
+ 3780 × 0 giving us 0
+ 3780 × 80 giving us 302400
+ 3780 × 500 which equals 1890000
+ 3780 × 5000 which equals 18900000

= 21092400
