#mainframe {
  background-color: white;
  position: absolute;
  top: 100px;
  left: 425px;
  width: 500px;
  height: 400px;
}
#firstvalue {
  text-align: center;
  position: absolute;
  top: 150px;
  left: 50px;
  width: 80px;
  height: 40px;
}
#secondvalue {
  text-align: center;
  position: absolute;
  top: 150px;
  left: 160px;
  width: 80px;
  height: 40px;
}
#getanswer {
  position: absolute;
  top: 250px;
  left: 210px;
  height: 40px;
  width: 80px;
}
#answer {
  text-align: center;
  position: absolute;
  top: 150px;
  left: 360px;
  width: 80px;
  height: 40px;
  background-color: rgba(173, 165, 161, 0.973);
  border: 0px solid black;
}
body {
  background-color: rgba(99, 236, 110, 0.658);
}