There are 48 students in Class 61. In the final exam last semester, those with excellent Chinese scores accounted for 1/3 of the class, and those with excellent math scores accounted for 1/4 of the class. Excellent students account for 1/2 of the whole class. How many students are excellent in language and mathematics?
六1班有48人，上学期期终考试，语文成绩优秀的占全班人数的(1/3)，数学成绩优秀的占全班人数的(1/4)，语、数两科至少有一门优秀的共占全班人数的(1/2)，语、数两科都优秀的学生共有多少人．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">48 * (1/3)</gadget>
<output>16</output>

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

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

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">48 * (1/2)</gadget>
<output>24</output>

<gadget id="calculator">12 - 24</gadget>
<output>-12</output>

<gadget id="calculator">16 + (-12)</gadget>
<output>4</output>

<result>4</result>