This example visualizes 2022 US auto sales by brand using a pie chart built with D3 v5. The chart displays proportional slices for each brand, with a legend showing brand names and corresponding sales values in thousands, alongside color-coded rectangles. The code loads CSV data from a GitHub gist via `d3.csv`, processes it with `d3.pie`, and renders SVG paths using `d3.arc` with ordinal color scaling. Legends are appended as SVG groups, and sales values are formatted with `d3.format`.