Alright, let's work through 9931 times 9887 step by step
9931 × 9887 = 9887 × (9931)
+ 9887 × 1 yielding 9887
+ 9887 × 30 which equals 296610
+ 9887 × 900 which equals 8898300
+ 9887 × 9000 giving us 88983000

= 98187797
