No problem, we've got 3936 and 4580 to multiply
3936 × 4580 = 4580 × (3936)
+ 4580 × 6 which equals 27480
+ 4580 × 30 that equals 137400
+ 4580 × 900 that is equal 4122000
+ 4580 × 3000 yielding 13740000

= 18026880
