No problem, we've got 6912 and 4389 to multiply
6912 × 4389 = 4389 × (6912)
+ 4389 × 2 yielding 8778
+ 4389 × 10 that is equal 43890
+ 4389 × 900 what gives us 3950100
+ 4389 × 6000 that equals 26334000

= 30336768
