GDP (Gross Domestic Product in US dollars):
Germany — 3,635,959,000
Ukraine — 176,309,000
Germany — 80,716,000
Ukraine — 45,400,000 (including Crimea, which really is now part of Russia; Wikipedia gives various differing figures)
So, dividing GDP dollars by the population figures, we have:
Germany — $3,635,959,000/80,716,000 = $45.046 excess dollars per person.
Ukraine — $176,309,000/45,400,000 = $3.883 excess dollars per person.
The excess produced by each German divided by that produced by each Ukrainian is: 45.046/3.883 = 11.6008.
These GDP figures are rather fuzzy, by the way; some people count sex work as part of the GDP and other don't. If a skyscraper is built and then promptly torn down then both of these expenses are presumably counted as contributions to this GDP. But still, any comparison of Ukraine's productional infrastructure with Germany's should give one a clear basis for accepting the above figures. (If my math is valid.)
The thing to note is that Germany is a valuable place indeed; Ukraine not so much, since each German produces well over 11 times as much. So suppose Russia cuts off its huge supply of gas to Germany, and Germany's economy falls apart? The U.S.A. cannot frack everybody's back yard and send the gas to Europe. It would even have to be liquified via cooling and pressurizing in order to be shipped; and that would use up half its energy on the spot.
So is it really worth having the U.S.A. accepting a very great risk of starting a thermonuclear war (WWIII) with Russia over Ukraine? Do you want to risk getting fried while the eleets run for their deep underground palaces? I surely do not!
So — I sincerely hope that Russia tells the Europeans to get in the way of the U.S.A.'s reckless and absurd Ukraine adventure — and if they don't, they get no more gas ever again. After all if the nukes start flying it won't matter anyway.