spacemakerman

Thanks friend, it worked! ????

<script type="text/javascript">
var slider_field_name = 'fieldname1';
fbuilderjQuery(document).on('change', '[id*="'+slider_field_name+'_"]', function(){
    let f = getField(slider_field_name),
        e = f.jQueryRef().find('[type="text"]'),
        v = f.val();
    
    e.val(v+'m2');
});
</script>

It works, thank you very much for the solution and help! ????