The number of male and female students in the fourth grade of a certain school is the same. They want to participate in the gymnastics performance. There are 25 boys in each row, 18 rows, and 30 girls in each row. How many rows can they line up?
某校四年级的男女生人数相同，他们要参加体育会操表演，男生每排25人，排了18排，女生每排30人，可以排几排？
<gadget id="calculator">18 / 30</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">25 * (3/5)</gadget>
<output>15</output>

<result>15</result>