Trying to compile fontawesome-free@6.1.1 with gulp-sass+sass and the return of fa-divide apparently cannot be calculated in line.

[hmdan10188]

Trying to compile fontawesome-free@6.1.1 with gulp-sass+sass and the return of fa-divide apparently cannot be calculated in line.

fails
$fa-li-margin : $fa-li-width * fa-divide(5, 4) !default; // Undefined operation "2em * fa-divide(5, 4)"

works
$fa-li-margin : fa-divide(5, 4) !default;
$fa-li-margin : $fa-li-width * $fa-li-margin;

Originally posted by @joelstransky in FortAwesome/Font-Awesome#18908