Since commit odoo/odoo@9c41002b39, the `.oi-fw` width value contained the `$oi-fw-ratio` variable name instead of its value once compiled. This commit fixes it by using SCSS interpolation, as expected. To use SCSS variable in CSS `calc()`, the variable should use interpolation to be properly evaluated at compile time. Note: this apply only for LibSass, Ruby Sass and Dart Sass prior to 1.40.0. Reference: https://sass-lang.com/documentation/values/calculations closes odoo/odoo#90125 X-original-commit: 2465c9206a78289b294599451959c6cbc2c938d3 Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com> Signed-off-by: Pierre Paridans (app) <app@odoo.com>