No problem, we've got 1969 and 1920 to multiply
1969 × 1920 = 1920 × (1969)
+ 1920 × 9 which equals 17280
+ 1920 × 60 that is equal 115200
+ 1920 × 900 that equals 1728000
+ 1920 × 1000 that equals 1920000

= 3780480
