Alright, let's work through 4089 times 6311 step by step
4089 × 6311 = 6311 × (4089)
+ 6311 × 9 that equals 56799
+ 6311 × 80 what gives us 504880
+ 6311 × 000 which equals 0
+ 6311 × 4000 giving us 25244000

= 25805679
