Alright, let's work through 6389 times 1059 step by step
6389 × 1059 = 1059 × (6389)
+ 1059 × 9 that results in 9531
+ 1059 × 80 that is equal 84720
+ 1059 × 300 resulting in 317700
+ 1059 × 6000 that results in 6354000

= 6765951
