Alright, let's work through 8390 times 4082 step by step
8390 × 4082 = 4082 × (8390)
+ 4082 × 0 which equals 0
+ 4082 × 90 which equals 367380
+ 4082 × 300 giving us 1224600
+ 4082 × 8000 yielding 32656000

= 34247980
