Alright, let's work through 8586 times 8470 step by step
8586 × 8470 = 8470 × (8586)
+ 8470 × 6 resulting in 50820
+ 8470 × 80 that equals 677600
+ 8470 × 500 giving us 4235000
+ 8470 × 8000 yielding 67760000

= 72723420
