No problem, we've got 6312 and 2169 to multiply
6312 × 2169 = 2169 × (6312)
+ 2169 × 2 what gives us 4338
+ 2169 × 10 what gives us 21690
+ 2169 × 300 producing 650700
+ 2169 × 6000 yielding 13014000

= 13690728
