In the first grade of a certain elementary school, the original Young Pioneers were non-Young Pioneers (1/3), and later 39 students joined the Young Pioneers organization. In this way, the Young Pioneers are non-Young Pioneers (7/8). How many students are there in the first-year team?
某小学一年级原有少先队员是非少先队员的(1/3)，后来又有39名同学加入了少先队组织．这样，少先队员是非少先队员的(7/8)．一年级队员有学生多少人？
<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(7/15) - (1/4)</gadget>
<output>13/60 = around 0.216667</output>

<gadget id="calculator">39 / (13/60)</gadget>
<output>180</output>

<result>180</result>