Then that would be my mistake. Usually the only time I've asked is in PLO (ie. someone bets the pot and a 2nd villain bets the pot), a holdem hand is not hard to follow.
Pot-Pot means you are facing a bet of 4-times the original pot-size, and the pot is currently 6-times what it was before both bets (assuming you aren't the original bettor in which case the raise to you is 3-times the starting pot not 4). So, you can multiply the original pot size by 6 to get your new pot size.
These bet multipliers are the same critical SPR numbers that determine how
hands should be played, basically it
tells you how many bets that it would take to get stacks in.
1 pot sized bet: 1 x pot
2 pot sized bets: 4 x pot
3 pot sized bets: 13 x pot
4 pot sized bets: 40 x pot
5+ pot sized bets: [here lies madness]
Turning that into pot-sizes is based on a little logic. Usually, I think of how much the second to last pot-sized raiser needs to call.
Pot-Pot-Pot would mean I am facing a bet of 13 times the original pot. The second to last raiser made it 4 times pot and needs to call 9 times pot. A pot-sized bet/raise always offers 2-1 to the last caller/raiser. Which means it must be 18-9 for the second to last raiser. Meaning the pot size is currently 18 times the original pot size.
I find it harder when it's a mix of money bets followed by a pot raise and/or a pot reraise. It's still about multiplying and adding things. And, a little logic, but it can be pretty confusing.
Edit: Some of the above math assumes it is the same two people raising or reraising. Which is usually good enough. It three different people pot in a row, the math is a little different. It would be 20 times the original pot. But, it's close enough to 18 times unless you're deep into the madness territory (where stacks are hundreds of times the size of the pot... which usually means several hundred or thousand blinds deep).
Edit 2: It helps to think of multiples of the pot size first... then go back to the dollar amount you last had in your head. Makes the numbers easier to keep track of, and the numbers are the same for most situations.