I fixed the calculator format by implementing the iframe-based architecture from the zip, added the missing /calculator route to resolve the blank page issue, updated the navigation to use React Router’s navigate instead of window.location.href, implemented authentication bridging between React and legacy HTML pages, configured legacy page loaders for all routes, set up basketball and football subdirectories with their own calculators, added proper CSS module imports for all pages, integrated the sidebar, mobile nav, and toast components, and established the services for ratings and monetization.