Alright, let's work through 9921 times 8567 step by step
9921 × 8567 = 8567 × (9921)
+ 8567 × 1 producing 8567
+ 8567 × 20 that equals 171340
+ 8567 × 900 resulting in 7710300
+ 8567 × 9000 that is equal 77103000

= 84993207
