Alright, let's work through 4005 times 4716 step by step
4005 × 4716 = 4716 × (4005)
+ 4716 × 5 resulting in 23580
+ 4716 × 00 yielding 0
+ 4716 × 000 yielding 0
+ 4716 × 4000 yielding 18864000

= 18887580
