A batch of notebooks was distributed to the students in Class 1, Grade 6, with an average of 12 notebooks per person. If it is only distributed to girls, each person can get 20 copies on average. If it is only distributed to boys, how many copies can each person get on average.
一批本子分发给六年级一班学生，平均每人分到12本．若只发给女生，平均每人可分到20本，若只发给男生，平均每人可分得多少本．
<gadget id="calculator">12 / 20</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 20</gadget>
<output>12</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">12 / (2/5)</gadget>
<output>30</output>

<result>30</result>