How soon can one achieve financial freedom?

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If one saves 25% of ones income and if you earn 25% interest on your savings (on the stock market of course, where else can you earn 25%?), then how soon can one be financially free? Inflation may be assumed to be 10% to make the calculations easier. The aim is to earn an income equal to your current income plus inflation to offset the cost of living increase. Any math wizards around?