Vim macroses

In vim u can record a sequence of commands to a register. What does it mean for you? No more tedious text editing, you can record your work and replay it N times.
Assume you need a numbered list:

1

Write the following commands:

qaYp<ctrl a>q

1. q - start recording
   
2. a - write macros into register 'a'
   
3. Y - yanks the line
   
4. p - paste yanked on the line below
   
5. <ctrl a> - increment value
   
6. q - stop recording
   

Now you can write "10@a" to repeat macros from register 'a' 10 times.
The result will be the following:

1
2
3
4
5
6
7
8
9
11
12