The number of girls in Class 6 and 5 in the first semester accounted for 5/12 of the whole class, and 4 girls were transferred in the second semester. At this time, the number of girls accounted for 6/13 of the whole class. How many students are there in the class now?
六5班第一学期女生人数占全班人数的(5/12)，第二学期转入4名女生，这时女生人数占全班人数的(6/13)．现在全班学生有多少人？
<gadget id="calculator">13 - 6</gadget>
<output>7</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">12 - 5</gadget>
<output>7</output>

<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(6/7) - (5/7)</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">1 - (6/13)</gadget>
<output>7/13 = around 0.538462</output>

<gadget id="calculator">4 / (1/7) / (7/13)</gadget>
<output>52</output>

<result>52</result>