No problem, we've got 1391 and 7841 to multiply
1391 × 7841 = 7841 × (1391)
+ 7841 × 1 what gives us 7841
+ 7841 × 90 producing 705690
+ 7841 × 300 that equals 2352300
+ 7841 × 1000 what gives us 7841000

= 10906831
