There are 30 people in an interest group, and there are 6 fewer male students than female students. How many male students are there?
一个兴趣小组共有30人，其中男同学比女同学少6人，男同学有多少人？
<gadget id="calculator">30 - 6</gadget>
<output>24</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<result>12</result>