Per the US Energy Information Administration, in 2019, Germany used 8.6 billion cubic feet of natural gas...per day. That's just one country of Europe.
Per Statista, total EU natural gas consumption in 2020 (which was a low year due to COVID lockdowns) was 379.9 billion cubic meters. When converting to billion cubic feet, this becomes 13,416 BCF in gas consumption in 2020.
So at 100% storage capacity (at least going by your numbers), the EU has slightly over one season's worth of natural gas consumption available in storage...and that's only if their consumption is at 2020 COVID lockdown levels.
Hope they're building more capacity...although from recent reports, it seems firing back up their old coal plants is the path they've chosen.
Bummer for Europe that Canada will not permit the Russians to resume exports of their natural gas.