In the investment world, Warren Buffett’s name is legendary. As the “Oracle of Omaha” who has steered Berkshire Hathaway for over half a century, his astonishing wealth growth trajectory has made him an idol revered by countless investors. People are eager to dissect his investment philosophy, from “value investing” to “margin of safety,” from “circle of competence” to “moat,” with interpretations abounding. Yet few realize that what truly underpins his investment career and fuels his wealth legend is a seemingly simple yet infinitely powerful mathematical formula—the compound interest formula: Return = Principal × (1 + r)^t.Within this formula, three core…