No problem, we've got 4067 and 8400 to multiply
4067 × 8400 = 8400 × (4067)
+ 8400 × 7 yielding 58800
+ 8400 × 60 resulting in 504000
+ 8400 × 000 which equals 0
+ 8400 × 4000 yielding 33600000

= 34162800
