Alright, let's work through 9129 times 1111 step by step
9129 × 1111 = 1111 × (9129)
+ 1111 × 9 that equals 9999
+ 1111 × 20 which equals 22220
+ 1111 × 100 yielding 111100
+ 1111 × 9000 that results in 9999000

= 10142319
