body {
  margin-left: 20px;
  color: #fff;
  background: #1D4497;
  font-family: Arial;
  font-size: 25px;
}
button {
  font-size: 25px;
}
input[type="number"] {
  position: relative;
  width: 40%;
  font-size: 25px;
}
#num1 {
  left: -10px;
}
#num2 {
  left: 10px;
}
button {
  color: #97A1CF;
  border: solid #6751AC;
  background: #6751AC;
}