six-digit \overline{abcdef}, if it satisfies 4*\overline{abcdef}=\overline{fabcde}, then \overline{abcdef} is called "spring number" (such as 4*102564=410256, then 102564 is " Spring Festival Number"). Please find the sum of all "spring numbers".
一个六位数\overline{abcdef}，如果满足4*\overline{abcdef}=\overline{fabcde}，则称\overline{abcdef}为"迎春数"(如4*102564=410256，则102564就是"迎春数")．请你求出所有"迎春数"的总和．
<gadget id="calculator">4 + 5 + 6 + 7 + 8 + 9</gadget>
<output>39</output>

<gadget id="calculator">25_641 * 39</gadget>
<output>999_999</output>

<result>999_999</result>