Alright, let's work through 6386 times 8638 step by step
6386 × 8638 = 8638 × (6386)
+ 8638 × 6 resulting in 51828
+ 8638 × 80 that is equal 691040
+ 8638 × 300 yielding 2591400
+ 8638 × 6000 what gives us 51828000

= 55162268
