Alright, let's work through 8317 times 1289 step by step
8317 × 1289 = 1289 × (8317)
+ 1289 × 7 resulting in 9023
+ 1289 × 10 resulting in 12890
+ 1289 × 300 resulting in 386700
+ 1289 × 8000 yielding 10312000

= 10720613
