Alright, let's work through 9107 times 1981 step by step
9107 × 1981 = 1981 × (9107)
+ 1981 × 7 what gives us 13867
+ 1981 × 00 what gives us 0
+ 1981 × 100 which equals 198100
+ 1981 × 9000 giving us 17829000

= 18040967
