The number of boys in Class 1 is equal to the number of girls (12/13), so what is the number of boys in the whole class?
六1班男生人数是女生人数的(12/13)，那男生人数是全班人数的多少
<gadget id="calculator">12 + 13</gadget>
<output>25</output>

<gadget id="calculator">12 / 25</gadget>
<output>12/25 = around 0.48</output>

<result>12/25 = around 0.48</result>