No problem, we've got 4928 and 1280 to multiply
4928 × 1280 = 1280 × (4928)
+ 1280 × 8 yielding 10240
+ 1280 × 20 that equals 25600
+ 1280 × 900 what gives us 1152000
+ 1280 × 4000 which equals 5120000

= 6307840
