Alright, let's work through 4000 times 5273 step by step
4000 × 5273 = 5273 × (4000)
+ 5273 × 0 yielding 0
+ 5273 × 00 that results in 0
+ 5273 × 000 which equals 0
+ 5273 × 4000 that is equal 21092000

= 21092000
