A circular gauge displays the value 158 out of 158 as 100%, with a needle rotating to the final position and labeled start, end, and current values. The chart is built with React components that define SVG elements, while D3’s `arc` generator and `scaleOrdinal` color scale construct six colored segments around the gauge. The needle, percentage text, and value labels are positioned using SVG transformations computed from the percentage. The implementation uses d3 v6 and React 17.