Alright, let's work through 6389 times 2047 step by step
6389 × 2047 = 2047 × (6389)
+ 2047 × 9 yielding 18423
+ 2047 × 80 that results in 163760
+ 2047 × 300 producing 614100
+ 2047 × 6000 producing 12282000

= 13078283
