Alright, let's work through 5379 times 4000 step by step
5379 × 4000 = 4000 × (5379)
+ 4000 × 9 producing 36000
+ 4000 × 70 that results in 280000
+ 4000 × 300 producing 1200000
+ 4000 × 5000 which equals 20000000

= 21516000
