Using 2, 3, 4, 5, 6, 7, 8 to form two three-digit numbers, what is the minimum difference?
用2、3、4、5、6、7、8组成两个三位数，最小差是多少．
<gadget id="calculator">523 - 487</gadget>
<output>36</output>

<result>36</result>