There are 24 male teachers in Dongfang Primary School, and the number of female teachers is 6 less than three times that of male teachers. How many female teachers are there?
东方小学有男教师24人，女教师的人数比男教师的3倍少6人，女教师有多少人？
<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">72 - 6</gadget>
<output>66</output>

<result>66</result>