If the numbers 2, 3, 4, and 5 are combined into four-digit numbers without repeating numbers, what is the sum of all such four-digit numbers?
将数字2，3，4，5组成没有重复数字的四位数，则所有这样的四位数的和是多少．
<gadget id="calculator">2 + 3 + 4 + 5</gadget>
<output>14</output>

<gadget id="calculator">14 * 6_666</gadget>
<output>93_324</output>

<result>93_324</result>