No problem, we've got 3964 and 5262 to multiply
3964 × 5262 = 5262 × (3964)
+ 5262 × 4 producing 21048
+ 5262 × 60 that is equal 315720
+ 5262 × 900 which equals 4735800
+ 5262 × 3000 yielding 15786000

= 20858568
