*{
    box-sizing: border-box;
}

.column{
    float:left;
    padding:2px;
    width:25%;
    margin-top: 20px;
}

.column img{
    width:100%;
    height: 400px;
    object-fit: cover;
}

.row::after{
    display: table;
    clear:both;
    content: "";
}

@media screen and (max-width:600px)
{
    .column{
        width:100%;
    }
}