The number of boys in a class is 5 less than the number of the whole class (5/8), and the number of girls is 2 less than the number of boys, find the number of the whole class.
某班的男生人数比全班人数的(5/8)少5人，女生比男生少2人，求全班的人数．
<gadget id="calculator">5 + 5 + 2</gadget>
<output>12</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

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

<result>48</result>