Moscow and its oblast are about 22M people. Metro areas weren't included, just the city limits of each one. The city of Moscow has a geographical footprint of 2562km2. Chicago is 607km2, LA is 1210 km2, and NYC is 783 km2, which all add up to be almost exactly Moscow's, and what's interesting is the population density of Moscow is about equal to other 3 US cities added and averaged.

for @bitcoin_citizen as well