There are 5 fewer girls than boys in a class, and the ratio of boys to girls is 3:2. How many people are there in this class?
某班女生比男生少5人，男女生人数的比是3：2，这个班共多少人．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>