Alright, let's work through 9984 times 8504 step by step
9984 × 8504 = 8504 × (9984)
+ 8504 × 4 that is equal 34016
+ 8504 × 80 that is equal 680320
+ 8504 × 900 giving us 7653600
+ 8504 × 9000 which equals 76536000

= 84903936
