How much gravel do I have to put in the $IWDA (-0,43 %) or $VWRL (-0,56 %) or $VWCE (-0,62 %) or $HMWO (-0,41 %) to be able to retire early?

Here is a link where you can calculate and set your goals :)

https://www.parqet.com/rechner/

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Info: Haven't checked it for accuracy yet - if anyone reads this at all, competitors and all...

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Maybe also something for @KevinE and @Epi