div {
    background-color: palevioletred;
    border: 8px #000000 dashed;
    margin: 190px auto;
    max-width: 1000px;
    height: 1000px;
}
ul li {
    border: 1px #000000 solid;
    float: left;
    margin-right: 30px;
    width: 43%;
    margin-bottom: 30px;
    padding: 0;
}
ul {
    list-style: none;
    margin: 0;
    padding: 0;
}
img {
    max-width: 100%;
}