table{
    color: #fff;
    text-align: center;
    border-collapse: collapse;
    font: normal 3em Arial, Helvetica, sans-serif ;
}
tr{
    height: 16.02vh;
    background-color: #4e494d;
}
td{
    width: 25vw;
    border: 1px solid #4e494d;
}
#inputBox{
    background-color: #4e494d;
    text-align: right;
    width: 90%;
    font-size: 2em;
    color: #fff;
    border: 0px;
}
.dgbut{
    background-color: #807e80;
}
.operbt{
    background-color: #ff9e06;
}
.acbut{
    background-color: #656165;
}