Alright, let's work through 5120 times 4387 step by step
5120 × 4387 = 4387 × (5120)
+ 4387 × 0 which equals 0
+ 4387 × 20 producing 87740
+ 4387 × 100 producing 438700
+ 4387 × 5000 which equals 21935000

= 22461440
