Alright, let's work through 6489 times 2591 step by step
6489 × 2591 = 2591 × (6489)
+ 2591 × 9 yielding 23319
+ 2591 × 80 giving us 207280
+ 2591 × 400 that results in 1036400
+ 2591 × 6000 giving us 15546000

= 16812999
