Alright, let's work through 6457 times 4039 step by step
6457 × 4039 = 4039 × (6457)
+ 4039 × 7 that equals 28273
+ 4039 × 50 resulting in 201950
+ 4039 × 400 which equals 1615600
+ 4039 × 6000 which equals 24234000

= 26079823
