Among the three-digit numbers composed of 6, 4, and 8, what is the sum of 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和是多少．
<gadget id="calculator">864 + 468</gadget>
<output>1_332</output>

<result>1_332</result>