The teacher brought three wooden boards with numbers 1, 2, and 3 written on them. How many uncountable pieces can Xiaoyue use these wooden boards to spell out?
老师拿来三块木板，上面分别写着数字1、2、3．小悦可以用这些木板拼出多少个不贩数？
<gadget id="calculator">3 + 6 + 6</gadget>
<output>15</output>

<result>15</result>