Alright, let's work through 6839 times 3039 step by step
6839 × 3039 = 3039 × (6839)
+ 3039 × 9 giving us 27351
+ 3039 × 30 yielding 91170
+ 3039 × 800 which equals 2431200
+ 3039 × 6000 producing 18234000

= 20783721
