Alright, let's work through 6405 times 8718 step by step
6405 × 8718 = 8718 × (6405)
+ 8718 × 5 what gives us 43590
+ 8718 × 00 giving us 0
+ 8718 × 400 what gives us 3487200
+ 8718 × 6000 giving us 52308000

= 55838790
