No problem, we've got 4405 and 6444 to multiply
4405 × 6444 = 6444 × (4405)
+ 6444 × 5 yielding 32220
+ 6444 × 00 that equals 0
+ 6444 × 400 what gives us 2577600
+ 6444 × 4000 which equals 25776000

= 28385820
