In a math test, the number of excellent students is (1/3) of the rest of the students. In another test, 4 people are added to the excellent students. At this time, the number of excellent students is (1/2) of the rest of the students. This class How many students are there?
一次数学测试，得优的人是其余人数的(1/3)，另一次测试中，得优的人添加了4人，此时得优的人数是其余学生的(1/2)，这个班有多少个学生？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</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">(1/3) - (1/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">4 / (1/12)</gadget>
<output>48</output>

<result>48</result>