The problem when giving border


Hello, I was trying to give a border, but it is said that it is incorrect. Actually this problem also happened on several previous lesson.

div {
    display: inline-block;
    margin-left: 5px;
    height: 100px;
    width: 100px;
    border-radius: 100%;
    border: 2px solid black;


make sure the browser zoom is set to 100% otherwise try a differnet browser


thanks. didnt notice that..