// ----
// Sass (v3.4.9)
// Compass (v1.0.1)
// ----

@mixin property($property, $multiple) {
  @supports($property: 1rem){
    #{$property}: ($multiple / $base-font-size) * 1rem;
  };
  #{$property}: $multiple * 1px;
}

.text {
  @include property(font-size, 2);
}