:root {
  scrollbar-gutter: stable;
}

body {
  margin: auto;
  width: 32em;
}

form {
  display: grid;
  grid-template-columns: 4em 1fr;
  gap: 1ex;
}

label,
input[type=number] {
  text-align: right;
}

input[type=number] {
  width: 8em;
}