No problem, we've got 5436 and 3823 to multiply
5436 × 3823 = 3823 × (5436)
+ 3823 × 6 that equals 22938
+ 3823 × 30 producing 114690
+ 3823 × 400 resulting in 1529200
+ 3823 × 5000 that is equal 19115000

= 20781828
