Write a three-digit number arbitrarily, and the numbers in each digit are not equal (such as 327). Use the numbers in each digit of the three-digit number to form a maximum number and a minimum number, and subtract the minimum number from the maximum number to obtain a new three-digit number. For the newly obtained three-digit number, repeat the above process, and get a new three-digit number..., keep repeating, what rules have you found? How much (in one sentence).
任意写出一个三位数，它的各个数位上的数字都不相等(如327)．用这个三位数各个数位上的数字组成一个最大数和一个最小数，并用最大数减去最小数，得到一个新的三位数．对于新得到的三位数，重复上面的过程，又得到一个新的三位数…，一直重复下去，你发现了什么规律？多少(用一句话说明)．
<gadget id="calculator">732 - 237</gadget>
<output>495</output>

<result>495</result>