<!DOCTYPE HTML>
<html>
    <body>
        <fieldset style="display:grid; overflow:hidden; grid-template-columns: repeat(4,50px); grid-auto-rows: 20px; width:200px; height:200px;">
            <legend>Legend</legend>
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
        </fieldset>
        <fieldset style="display:grid; grid-auto-columns: 50px; grid-auto-rows: 20px;">
            <legend>Legend</legend>
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
            <p>X
        </fieldset>
    </body>
</html>