Alright, let's work through 5891 times 8871 step by step
5891 × 8871 = 8871 × (5891)
+ 8871 × 1 that equals 8871
+ 8871 × 90 giving us 798390
+ 8871 × 800 that equals 7096800
+ 8871 × 5000 that results in 44355000

= 52259061
