.buttons {
    display: grid;
    grid-template-columns: auto auto auto auto ;
    margin-left: auto;
    margin-right: auto;
    height: 200px;
    width: 200px;
}
.buttons-style {
    border-color: black;
    border-style: solid;
    font-size: 25px;
    border-radius: 10px;
}
.displa {
    font-size: 20px;
    background-color: beige;
    height: 40px;
    width: 200px;
    margin-left: auto;
    margin-right: auto;
    margin-top: 100px;
    border-radius: 10px;
}