There are 10 children in the big class of the kindergarten. Now, 60 apples are equally distributed to the children in the big class and the small class. Each child can get 2 apples. How many children are there in the small class?
幼儿园大班有10个小朋友，现在把60个苹果平均分给大班和小班的小朋友，每个小朋友可分得2个，小班有多少个小朋友？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">60 - 20</gadget>
<output>40</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<result>20</result>