The ratio of boys to girls in Class 1 was 13:12 in the last semester, and 2 girls were transferred in this semester. This means that the number of girls accounts for exactly 50% of the class. How many boys are there in this class?
六一班上学期男生与女生人数比是13：12，这学期又转来2名女生，这是女生人数正好占全班人数的50%，这个班男生多少人？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

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

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

<gadget id="calculator">12 / 13</gadget>
<output>12/13 = around 0.923077</output>

<gadget id="calculator">1 - (12/13)</gadget>
<output>1/13 = around 0.076923</output>

<gadget id="calculator">2 / (1/13)</gadget>
<output>26</output>

<result>26</result>