In the fifth grade mathematics extracurricular interest group of Guangming Primary School, girls accounted for (3/8). Later, 4 girls joined the group, and girls accounted for (4/9) of the group. How many students were in the group originally?
在光明小学五年级数学课外兴趣小组中，女生人数占(3/8)，后来小组又有4名女生加入，这时女生占小组人数的(4/9)．这个小组原来有多少名学生？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(4/9) * 4</gadget>
<output>16/9 = around 1.777778</output>

<gadget id="calculator">4 - (16/9)</gadget>
<output>20/9 = around 2.222222</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(4/9) - (3/8)</gadget>
<output>5/72 = around 0.069444</output>

<gadget id="calculator">(20/9) / (5/72)</gadget>
<output>32</output>

<result>32</result>