There are 32 students in a class, and the ratio of girls to the total number is 3:8, how many girls are there?
某班有学生32人，女生与总人数的比是3：8，则女生有多少
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">32 * (3/8)</gadget>
<output>12</output>

<result>12</result>