No problem, we've got 4123 and 480 to multiply
4123 × 480 = 480 × (4123)
+ 480 × 3 what gives us 1440
+ 480 × 20 what gives us 9600
+ 480 × 100 giving us 48000
+ 480 × 4000 what gives us 1920000

= 1979040
