This pie chart visualizes product sales data, displaying the proportional share of each product category as a colored slice with corresponding legend labels and percentage values. The chart loads CSV data from a GitHub gist via `d3.csv` and renders it using D3 v5’s `pie` and `arc` generators, with `scaleOrdinal` assigning category colors. Legends are appended as SVG groups, showing category names and computed percentages, while the total sales value is calculated by summing the numeric `Value` field from the dataset.