This example visualizes top product sales as an interactive pie chart, with a legend displaying each product name and its corresponding unit count. The chart renders using D3 v5 within a React framework, leveraging `d3.pie`, `d3.arc`, and `d3.scaleOrdinal` with `schemeCategory10` for color encoding. Data is loaded from an external CSV file via `d3.csv`, sorted by sales value, and the top 10 items are selected for display. The SVG-based visualization includes hover logging of sales values, with legends positioned alongside the chart.