Alright, let's work through 8685 times 390 step by step
8685 × 390 = 390 × (8685)
+ 390 × 5 which equals 1950
+ 390 × 80 that equals 31200
+ 390 × 600 that is equal 234000
+ 390 × 8000 which equals 3120000

= 3387150
