How does Russia's economy keep booming despite West's sanctions?

Russia recorded a total revenue of over $40 billion last month– the highest since January 2011. The spike in revenue came despite Western sanctions designed to choke off funding for Russia’s war in Ukraine

How does Russia's economy keep booming despite West's sanctions?
Russia recorded a total revenue of over $40 billion last month– the highest since January 2011. The spike in revenue came despite Western sanctions designed to choke off funding for Russia’s war in Ukraine