No problem, we've got 4283 and 4805 to multiply
4283 × 4805 = 4805 × (4283)
+ 4805 × 3 which equals 14415
+ 4805 × 80 what gives us 384400
+ 4805 × 200 that results in 961000
+ 4805 × 4000 resulting in 19220000

= 20579815
