No problem, we've got 4064 and 6920 to multiply
4064 × 6920 = 6920 × (4064)
+ 6920 × 4 resulting in 27680
+ 6920 × 60 that equals 415200
+ 6920 × 000 what gives us 0
+ 6920 × 4000 resulting in 27680000

= 28122880
