No problem, we've got 1391 and 3191 to multiply
1391 × 3191 = 3191 × (1391)
+ 3191 × 1 yielding 3191
+ 3191 × 90 producing 287190
+ 3191 × 300 producing 957300
+ 3191 × 1000 that is equal 3191000

= 4438681
