.calculator-body{
    width: 350px;
    background-color: #B6B6B6;
    padding: 20px;
    border-radius: 20px;
    padding-bottom:30px;
    box-shadow: -10px 10px 20px 5px #6F6F6F;
    margin: auto;
}
@media only screen and (max-device-width : 350px)
{
    .calculator-body{
        width: 100%;
    }
}
.erase-btn{
    color: red;
    background-color: white;
    border-top-left-radius: 20px;
    border-bottom-left-radius: 20px;
}
.digit-btn{
    width: 100%;
}