Answer 1

What exactly do you want to output? Its not very clear.
Do you want a square table, or just two columns?
Also is its size fixed or dynamic?

Answer 2

So your output is a*1, a*2, a*3... And so on
All you need for that is a for loop that prints the equation in a new line each time.
For(int b = 1;b<=12; b++)
{
Your equation
}