Im trying to create my first webpage and this is getting complicated for me.  

Im trying to display this in 3 different and equaly sized columns but the closest I've been able to implement this was this:

```css
article {
  display: flex;
}
```

```html
<article>

  <section id="sec1">
    <p> info </p>
  </section>

  <section id="sec2">
    <p> info </p>
  </section>

  <section id="sec3">
    <p> info </p>
  </section>

</article>
```

This form adequately distributes the information in the 3 columns, but they do not occupy the same space.
I appreciate any kind of help or recommendation, thanks.