body {
  background-color: #8fb3d6;
}
body .container {
  background-color: #FFFFFF;
  padding: 50px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  -ms-border-radius: 5px;
  border-radius: 5px;
  -webkit-box-shadow: 5px 5px 15px #000000;
  -moz-box-shadow: 5px 5px 15px #000000;
  -ms-box-shadow: 5px 5px 15px #000000;
  box-shadow: 5px 5px 15px #000000;
}
body .container .row #calc {
  text-align: right;
}
body .container .row #display {
  height: 100px;
  text-align: right;
  font-size: 40px;
}
body .container .row button {
  height: 100px;
  font-size: 40px;
}