I'd like to position two matrices under each other so that the columns of the matrices are rendered under each other, too. An example what I'd like to have:

```
  |100 200|
A=| 30  3 |
  | 1  119|

b=[ 1   0 ]

```

I've tried this:

```
\begin{align*}
    A= &\begin{vmatrix}
        100 & 200 \\
        30 & 3\\
        1 & 119
    \end{vmatrix}\\
    b= &\begin{bmatrix}
        1 & 0
    \end{bmatrix}
\end{align*}

```

...but it only aligns the = signs, but not the columns of the two matrices. What's the trick? Thanks in advance!