#slidediv {
    background-color: #CCCCCC;
    max-width: 700px;
    display: flex;
}

#slidediv div {
    border: black solid 2px;
}

#slidediv .slides {
    flex: auto;
}

.slideNext,
.slidePrev {
    flex: 20px;
    position: relative;
    padding: 10px;
}

.slideNext .fa,
.slidePrev .fa {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    -webkit-transform:scale(1,2); /* Safari and Chrome */
    -moz-transform:scale(1,2); /* Firefox */
    -ms-transform:scale(1,2); /* IE 9 */
    -o-transform:scale(1,2); /* Opera */
    transform:scale(1,2); /* W3C */
}

#slidediv img {
    max-width: 100%;
    max-height: 100%;
}