@Hans
The economy graph is actually somewhat misleading, although in the opposite direction than would help Henri.
Germany had a lot of economic power on paper, and had occupied a lot more from Czechoslovakia, Poland and, yes, France by the time they tangoed with Mother Russia, but they wasted A LOT of that potential.
One example is France. Well, France had aluminium factories and aeroplane factories, so they could have produced a lot of airplanes for the Luftwaffe. Well, Bauxite is refined into Aluminium by electrolysis. They literally have some big vats of molten ore, and very high electric current going through them. Well, for electricity, France would have needed coal. They actually calculated how much: 120,000 tons of coal per month. Germany gave them 4000.
The whole industry also needed logistics, and Germany wasn't letting them have enough of that either.
You can guess that France didn't produce a whole lot of airplanes. Furthermore, it ended up being not very economic either, since you had to pay the workers to mostly stand around, because most of the time they weren't getting the materials to make those airplanes. So it ended up costing a lot more to make an airplane in France.
Automobile industry is another aspect where France's industrial capacity was wasted. Especially when Germany needed rolling stock badly for the logistics, you'd think they'd make the most use of France's factories. But nope, by the end of the war, France had produced a piddly IIRC 11% of the Reich's automobiles.
Both France and the Netherlands also had a lot of shipyards. Again, mismanagement struck, with Netherlands contributing just 14% to the total shipbuilding, and France being way behind even that. If you don't give them coal and steel, they can't make many ships, can they?
Probably the biggest tragedy though was agriculture. At the same time the Nazis were drafting plans for how many Ukrainians to starve to steal their food, well, France had a lot of agriculture. So did Poland. But did I mention lack of rolling stock, because the Army was getting most of it? France produced a lot of milk, for example... which then went bad on the farm, because there wasn't enough capacity to transport it to where it was needed. Denmark had supplied Germany with a lot of beef and cattle to slaughter into beef before Hitler's autarky nonsense. Yeah, after conquering Denmark, not many trucks and trains showed up to pick those up either. Etc.
Even domestic industry was suffering from increasing lack of manpower, and being forced to use unqualified and half-starved slaves instead. It wasn't very efficient. Take for example the Type XXI electroboot submarines, the most advanced sub that Germany came up with. It turned out that using unqualified slaves to put them together, and in companies with no shipbuilding experience (hey, Albert Speer's decision) was such a crap idea, that they had MASSIVE quality issues and none went into service before the war ended.
Etc.
Basically looking at that graph and adding the circles for Germany and France gives the idea that, woot, the Third Reich had a lot more industrial capacity than the USSR. But in practice they ended up with something that was a lot less than the sum of its parts.