#calci {
border: 2px solid rgb(206, 199, 199);
border-radius: 5px;
width: 200px;
margin: auto;
}
#display {
    margin: 10px;
    width: 85%;
    font-size: 25px;
}
.button {
    width: 45px;
    height: 45px;
    margin: 3px;
}
.buttoncontainer {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}