No problem, we've got 6331 and 2390 to multiply
6331 × 2390 = 2390 × (6331)
+ 2390 × 1 what gives us 2390
+ 2390 × 30 what gives us 71700
+ 2390 × 300 that equals 717000
+ 2390 × 6000 yielding 14340000

= 15131090
