Every time you click a button to start a round, a precise sequence of events occurs behind the scenes. First, you select and confirm your bet amount. Once the request is sent, the game client communicates with a secure remote server. This server uses a mathematical algorithm to determine the outcome of the round instantly.
The most important thing to understand is that the result is decided the moment you hit the button. The animations you see on your screen—the spinning reels, the falling cards, or the moving multipliers—are simply a visual representation of a result that has already been calculated. These graphics are there to build excitement and provide a professional experience; they do not "calculate" the win as they move. Once the animation concludes, the server sends a final confirmation, and your account balance is updated automatically to reflect the win or loss.