Alright, let's work through 5391 times 878 step by step
5391 × 878 = 878 × (5391)
+ 878 × 1 giving us 878
+ 878 × 90 yielding 79020
+ 878 × 300 that equals 263400
+ 878 × 5000 producing 4390000

= 4733298
