<===> input.scss
a {
  width: 4.0px;
  height: 3.00px;
  opacity: 1.0;
}

<===> output.css
a {
  width: 4.0px;
  height: 3.00px;
  opacity: 1.0;
}

<===> output-dart-sass.css
a {
  width: 4px;
  height: 3px;
  opacity: 1;
}