I often just give up.
In that sense, flying somehow feels like a much more standardised and straightforward experience, despite a ton of different ticketing websites, airlines and airports which all have their own apps and gates and conditions etc, too.
Buy one ticket, and it asks you for money, the bill slot opens, you put money in, the bill slot closes, the ticket prints, and then the change return door opens. After you take your change, the change return door closes.
If you buy 4 tickets: it asks you for money, the bill slot opens, you put money in, the bill slot closes, the first ticket prints, and then the change return door opens, you take you change and then it closes. Then, the bill slot opens and closes, the second ticket prints, then the change return door opens and closes (repeat 2 more times). I know just the type of “meets the requirements” engineers that made this.