There are 40 students in Class 1 of June. The ratio of the number of boys to the number of girls is 3:2. How many girls are there?
六1班有40人，男生人数与女生人数的比是3：2，女生有多少人．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>