<===> input.scss
$foo: 2px;
$bar: 5in;

foo {
  bar: #{($foo*$bar)};
}

<===> error
Error: 10in*px isn't a valid CSS value.
        on line 5 of input.scss
  Use --trace for backtrace.

<===> error-dart-sass
Error: 10px*in isn't a valid CSS value.
  ,
5 |   bar: #{($foo*$bar)};
  |          ^^^^^^^^^^^
  '
  input.scss 5:10  root stylesheet