Class 1 students in Grade 6 participated in the tree planting activity, and each student got 12 saplings on average. If it is only distributed to girls, each person can get 20 trees on average; if it is only distributed to boys, how many trees can each person get on average.
六年级一班学生参加植树活动，平均每人分到12棵小树苗．若只发给女生，平均每人可分得20棵：若只发给男生，平均每人可分得多少棵．
<gadget id="calculator">60 / 12</gadget>
<output>5</output>

<gadget id="calculator">60 / 20</gadget>
<output>3</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<result>30</result>