.container {
    display: flex;
}

.box {
    width: 100px;
    height: 100px;
    color: white;
    background-color: grey;
    font-size: 24px;
    border: 1px solid black;

    display: flex;
    justify-content: center;
    align-items: center;

    text-align: center;
    margin: 10px;
    padding: 0px;
}