The teacher has some ballpoint pens in his hand, and he distributes them to 6 children on average. Each child gets 4 pens, and there are 4 pens left. How many ballpoint pens are there?
老师手里有一些圆珠笔，平均分给6个小朋友，每个小朋友分4枝，还剩4枝，这些圆珠笔有几枝？
<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">24 + 4</gadget>
<output>28</output>

<result>28</result>