#result-background {
  padding: 60px;
  background: #fff;
}
#result {
  width: 300px;
  height: 300px;
  background: #0876fe;
}
#add {
  width: 80px;
  height: 80px;
  padding: 0;
}
input[type="number"] {
  margin-left: auto;
}