The ratio of girls to boys in the chorus group is 5:7, and there are 25 girls among them. How many boys are there in this chorus group? (Answer with proportional knowledge)
合唱组女生男生人数的比是5：7，其中有女生25人，这个合唱组男生多少人？(用比例知识解答)
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">25 / (5/7)</gadget>
<output>35</output>

<result>35</result>