Alright, let's work through 4828 times 4003 step by step
4828 × 4003 = 4003 × (4828)
+ 4003 × 8 which equals 32024
+ 4003 × 20 what gives us 80060
+ 4003 × 800 yielding 3202400
+ 4003 × 4000 which equals 16012000

= 19326484
