On the flop, the pot is 5,400 chips, and when your opponent goes all-in, we’d need to call another 2,000 to win a pot of 9,400 total. That means we need 21.2% equity call. If we look at a hand like 3-2 of spades, we can now happily fold on a flop like QdJdTd, where we only have 8.55% equity against our opponent’s range. As long as we never fold a pair or a draw, it’s basically impossible for us to make a mistake, but we can still save chips on a lot of flops.