This example renders an aggregated pie chart of car selling prices grouped by make, with labels and leader lines connecting each slice to its name. The code uses D3 v7’s `d3.group`, `d3.sum`, `d3.pie`, and `d3.arc` to compute and draw the chart in SVG, along with a color scale via `d3.scaleOrdinal`. A legend and a data table are also generated from the same aggregated dataset, styled on a light blue background.