Alright, let's work through 4809 times 1250 step by step
4809 × 1250 = 1250 × (4809)
+ 1250 × 9 that results in 11250
+ 1250 × 00 that equals 0
+ 1250 × 800 that results in 1000000
+ 1250 × 4000 producing 5000000

= 6011250
