Alright, let's work through 5780 times 329 step by step
5780 × 329 = 329 × (5780)
+ 329 × 0 that equals 0
+ 329 × 80 that equals 26320
+ 329 × 700 resulting in 230300
+ 329 × 5000 yielding 1645000

= 1901620
