Alright, let's work through 4064 times 405 step by step
4064 × 405 = 405 × (4064)
+ 405 × 4 which equals 1620
+ 405 × 60 producing 24300
+ 405 × 000 that results in 0
+ 405 × 4000 what gives us 1620000

= 1645920
