body {
    background: #464646 url(background_2.jpg) no-repeat fixed center center;
    background-size: cover;
    justify-content: center;
    text-align: center;
}
.container {
    text-align:center;
    margin-top: 23px;
    
}
.calculator {
    display: inline-block;
    background-color: grey;
    border-radius: 53px;
    border: 4px solid rgb(63, 57, 57);
}
table{
    margin: auto;
}
input {
    font-size: 27px;
    margin-bottom: 20px;
    border-radius: 10px;
    border: solid;
    background-color: #e9e5e3;
}
#screen {
    height:50px;
    margin: 15px;
}
button {
    margin: 4px;
    font-size: 25px;
    width: 70px;
    height: 71px;
    background-color: lightyellow;
    border-radius: 10px;
}
.logo {
    display: flex;
    justify-content: center;
}
img {
    padding-top: 77px;
    margin: 20px;
    width: 50px;
    height: 50px;
}