There are 6 female students in the interest group, and the number of male students is twice the number of female students, which is 3 more. How many people are there in the interest group?
兴趣小组有6个女同学，男同学的人数是女同学人数的2倍还多3人，兴趣小组一共有多少人？
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 3 + 6</gadget>
<output>21</output>

<result>21</result>