No problem, we've got 5421 and 3865 to multiply
5421 × 3865 = 3865 × (5421)
+ 3865 × 1 which equals 3865
+ 3865 × 20 which equals 77300
+ 3865 × 400 which equals 1546000
+ 3865 × 5000 which equals 19325000

= 20952165
