No problem, we've got 4091 and 4440 to multiply
4091 × 4440 = 4440 × (4091)
+ 4440 × 1 yielding 4440
+ 4440 × 90 giving us 399600
+ 4440 × 000 what gives us 0
+ 4440 × 4000 what gives us 17760000

= 18164040
