Alright, let's work through 6489 times 1591 step by step
6489 × 1591 = 1591 × (6489)
+ 1591 × 9 yielding 14319
+ 1591 × 80 resulting in 127280
+ 1591 × 400 that results in 636400
+ 1591 × 6000 giving us 9546000

= 10323999
