No problem, we've got 6839 and 2151 to multiply
6839 × 2151 = 2151 × (6839)
+ 2151 × 9 yielding 19359
+ 2151 × 30 what gives us 64530
+ 2151 × 800 what gives us 1720800
+ 2151 × 6000 giving us 12906000

= 14710689
