Alright, let's work through 6798 times 8389 step by step
6798 × 8389 = 8389 × (6798)
+ 8389 × 8 what gives us 67112
+ 8389 × 90 producing 755010
+ 8389 × 700 what gives us 5872300
+ 8389 × 6000 what gives us 50334000

= 57028422
