No problem, we've got 5421 and 3609 to multiply
5421 × 3609 = 3609 × (5421)
+ 3609 × 1 resulting in 3609
+ 3609 × 20 producing 72180
+ 3609 × 400 which equals 1443600
+ 3609 × 5000 yielding 18045000

= 19564389
