No problem, we've got 1441 and 3991 to multiply
1441 × 3991 = 3991 × (1441)
+ 3991 × 1 that results in 3991
+ 3991 × 40 what gives us 159640
+ 3991 × 400 that is equal 1596400
+ 3991 × 1000 producing 3991000

= 5751031
