In soviet Russia, U.S. dollar equals one potato.
Alright, jokes aside. At the time of my last update in September 2021, one Russian ruble was worth about 0.013 U.S. dollars. That means it takes about 75 rubles to buy one U.S. dollar.
But currency exchange rates fluctuate all the time, so it's best to check the latest rates with a currency converter or a financial news source.