No problem, we've got 5421 and 7483 to multiply
5421 × 7483 = 7483 × (5421)
+ 7483 × 1 what gives us 7483
+ 7483 × 20 producing 149660
+ 7483 × 400 producing 2993200
+ 7483 × 5000 which equals 37415000

= 40565343
