No problem, we've got 5103 and 4072 to multiply
5103 × 4072 = 4072 × (5103)
+ 4072 × 3 yielding 12216
+ 4072 × 00 which equals 0
+ 4072 × 100 yielding 407200
+ 4072 × 5000 which equals 20360000

= 20779416
