No problem, we've got 4013 and 9944 to multiply
4013 × 9944 = 9944 × (4013)
+ 9944 × 3 what gives us 29832
+ 9944 × 10 producing 99440
+ 9944 × 000 that is equal 0
+ 9944 × 4000 yielding 39776000

= 39905272
