Alright, let's work through 8485 times 3964 step by step
8485 × 3964 = 3964 × (8485)
+ 3964 × 5 what gives us 19820
+ 3964 × 80 what gives us 317120
+ 3964 × 400 that is equal 1585600
+ 3964 × 8000 that is equal 31712000

= 33634540
