How much gravel do I have to put in the $IWDA (+0,07 %) or $VWRL (+0,03 %) or $VWCE (+0,01 %) or $HMWO (+0,08 %) 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