No problem, we've got 6472 and 2151 to multiply
6472 × 2151 = 2151 × (6472)
+ 2151 × 2 what gives us 4302
+ 2151 × 70 resulting in 150570
+ 2151 × 400 that equals 860400
+ 2151 × 6000 which equals 12906000

= 13921272
