I am embedding this:

```
<iframe src='https://www.embed.com/app/math-game/' style='width: 800px; height: 600px;' scrolling='no' frameBorder='0'></iframe>

```

but I see a small game with a huge black frame,
how could I embed just the game without that black frame?

Here is the page:

<https://www.sinapsi.org/wordpress/gioco/>

Thanks.