#container {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    flex-direction: row;
}

#math-output {
    width: 40%;
    height: 20em;
    padding: 1em;
    display: block;
    position: relative;
    overflow: scroll;
    background-color: #fff;
    font-size: 121%;
}

body {
    background-color: #f0f0f0;
}