Alright, let's work through 5981 times 9891 step by step
5981 × 9891 = 9891 × (5981)
+ 9891 × 1 giving us 9891
+ 9891 × 80 that equals 791280
+ 9891 × 900 which equals 8901900
+ 9891 × 5000 giving us 49455000

= 59158071
