Alright, let's work through 3580 times 5304 step by step
3580 × 5304 = 5304 × (3580)
+ 5304 × 0 which equals 0
+ 5304 × 80 producing 424320
+ 5304 × 500 what gives us 2652000
+ 5304 × 3000 yielding 15912000

= 18988320
