Alright, let's work through 4890 times 1582 step by step
4890 × 1582 = 1582 × (4890)
+ 1582 × 0 that is equal 0
+ 1582 × 90 that is equal 142380
+ 1582 × 800 which equals 1265600
+ 1582 × 4000 yielding 6328000

= 7735980
