Alright, let's work through 6489 times 4387 step by step
6489 × 4387 = 4387 × (6489)
+ 4387 × 9 what gives us 39483
+ 4387 × 80 that equals 350960
+ 4387 × 400 resulting in 1754800
+ 4387 × 6000 that equals 26322000

= 28467243
