Female students in the extracurricular group originally accounted for (1/3) of the whole group. After adding 4 female students, the female students accounted for (1/2) of the original number of the whole group. So what is the original number of the extracurricular group?
课外小组女同学原来占全组人数的(1/3)，加入4个女同学后，女同学就占全组原有人数的(1/2)，那么课外小组原来的人数是多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">4 / (1/6)</gadget>
<output>24</output>

<result>24</result>