Five cards are written with numbers 5, 6, 7, 8, and 9 respectively. If you take 3 cards from them and put them together, you can form a three-digit number. How many odd numbers are there in these three-digit numbers?
五张卡片分别写有数字5、6、7、8、9，如果从中任取3张卡片，排放在一起，就可以组成一个三位数，这些三位数中，有多少个奇数．
<gadget id="calculator">3 * 4 * 3</gadget>
<output>36</output>

<result>36</result>