Use 2, 4, 6 to form the largest three-digit number and the smallest three-digit number. How much is the difference between them?
用2、4、6三个数字组成最大的三位数和最小的三位数，它们相差多少．
<gadget id="calculator">642 - 246</gadget>
<output>396</output>

<result>396</result>