Alright, let's work through 1311 times 9981 step by step
1311 × 9981 = 9981 × (1311)
+ 9981 × 1 giving us 9981
+ 9981 × 10 what gives us 99810
+ 9981 × 300 that equals 2994300
+ 9981 × 1000 resulting in 9981000

= 13085091
