Alright, let's work through 8499 times 7812 step by step
8499 × 7812 = 7812 × (8499)
+ 7812 × 9 what gives us 70308
+ 7812 × 90 producing 703080
+ 7812 × 400 which equals 3124800
+ 7812 × 8000 which equals 62496000

= 66394188
