"Attention, those with weak nerves should not play, because it is too accurate. It's the神奇 Gypsy inherited fortune-telling method that can calculate your inner感应. Choose any two-digit number (or any number between 10~99), add the tens digit to the ones digit, and then subtract this sum from the number you chose. For example, if you choose 23, then 2+3=5, and 23-5=18."
Note: The words "神奇" (which means "magic" or "miraculous") and "感应" (which can mean "induction" or "telepathy/inner感应") are used here in the original Chinese text, but their direct translation might not make perfect sense in English context. In the translated sentence, I kept "神奇" as "magic" and interpreted "感应" as "inner induction" for better understanding. Depending on the exact tone or style required, these terms could be slightly adjusted.