Alright, let's work through 8427 times 9792 step by step
8427 × 9792 = 9792 × (8427)
+ 9792 × 7 yielding 68544
+ 9792 × 20 that is equal 195840
+ 9792 × 400 what gives us 3916800
+ 9792 × 8000 that is equal 78336000

= 82517184
