Among the three-digit numbers composed of 6, 4, and 8, what is the difference between the largest three-digit number and the smallest three-digit number?
用6、4、8组成的三位数中，最大的三位数和最小的三位数相差多少．
<gadget id="calculator">864 - 468</gadget>
<output>396</output>

<result>396</result>