No problem, we've got 6404 and 4416 to multiply
6404 × 4416 = 4416 × (6404)
+ 4416 × 4 that equals 17664
+ 4416 × 00 which equals 0
+ 4416 × 400 what gives us 1766400
+ 4416 × 6000 producing 26496000

= 28280064
