Alright, let's work through 8112 times 4905 step by step
8112 × 4905 = 4905 × (8112)
+ 4905 × 2 resulting in 9810
+ 4905 × 10 resulting in 49050
+ 4905 × 100 what gives us 490500
+ 4905 × 8000 that results in 39240000

= 39789360
