There are seven cards: 1, 1, 2, 3, 9, 9, 9, 3 of which can be arranged into three-digit numbers. If card 9 can be regarded as 6 after being rotated, how many even numbers are there?
有七张卡片：1、1、2、3、9、9、9，从中任取3张可排列成三位数．若其中卡片9旋转后可看作6，则排成的偶数有多少个．
<gadget id="calculator">15 + 23</gadget>
<output>38</output>

<result>38</result>