No problem, we've got 8091 and 5391 to multiply
8091 × 5391 = 5391 × (8091)
+ 5391 × 1 what gives us 5391
+ 5391 × 90 what gives us 485190
+ 5391 × 000 that is equal 0
+ 5391 × 8000 producing 43128000

= 43618581
