Alright, let's work through 5391 times 3456 step by step
5391 × 3456 = 3456 × (5391)
+ 3456 × 1 producing 3456
+ 3456 × 90 that is equal 311040
+ 3456 × 300 what gives us 1036800
+ 3456 × 5000 giving us 17280000

= 18631296
