No problem, we've got 6389 and 4017 to multiply
6389 × 4017 = 4017 × (6389)
+ 4017 × 9 what gives us 36153
+ 4017 × 80 that equals 321360
+ 4017 × 300 giving us 1205100
+ 4017 × 6000 which equals 24102000

= 25664613
