I was reading your previous conversation, and I understand it.
In this case, you could use the default Custom settings from the HTML widget (check the Advanced tab) so this can have the same height as the next column. Just be aware that you might need to change the HTML settings. In such a case, consult with the HTML code provider.
regarding the subject. i can see in the htmlcode. i can change the width and height. How can i use a different width and height for website tablet mobile. I know how can change the container. But when i change something in the code it change for the 3. Thanks