Alright, let's work through 4005 times 6429 step by step
4005 × 6429 = 6429 × (4005)
+ 6429 × 5 producing 32145
+ 6429 × 00 that results in 0
+ 6429 × 000 producing 0
+ 6429 × 4000 that results in 25716000

= 25748145
