Alright, let's work through 6396 times 1289 step by step
6396 × 1289 = 1289 × (6396)
+ 1289 × 6 producing 7734
+ 1289 × 90 producing 116010
+ 1289 × 300 giving us 386700
+ 1289 × 6000 what gives us 7734000

= 8244444
