isn't 630 billion considering the size of Russia quite peanuts? I mean, our german federal budget for a whole year is around that size and that's always assuming most functions accordingly
This is Russia's reserve in foreign currency. It was estimated to 630 billion. You only need it to cover what the country is importing when you can't do it in your own currency. And eventually, pay the debts and interests. Most of the federal budget would be spent locally on other stuff for which you don't need the USD.