how to find out how big an elemnts totla width is in css
<div>
To find the total width of an element use the following formula: width +
left padding + right padding + left border + right border + left margin
+ right margin. This element has a width of 350px based on the fomula.
</div>
<style>
div {
width: 320;
padding: 10px;
border: 5px;
margin: 0px;
}
</style>