This D3.js v7 example presents a pie chart visualizing gadget prices, with each slice labeled by name and a corresponding on-screen legend. A CSV dataset from a GitHub gist supplies the data, which drives a color-coded categorical scale. Segments are rendered as SVG paths, and hovering over a slice triggers a tooltip displaying the item name and price. The legend is built from rendered SVG rectangles, providing a static key alongside the animated chart interactivity.