No problem, we've got 5206 and 3991 to multiply
5206 × 3991 = 3991 × (5206)
+ 3991 × 6 yielding 23946
+ 3991 × 00 producing 0
+ 3991 × 200 which equals 798200
+ 3991 × 5000 that is equal 19955000

= 20777146
