The stationery store has 60 fountain pens and ballpoint pens. After selling 12 ballpoint pens, the number of fountain pens and ballpoint pens is the same. Please ask a question and answer it.
文具店有钢笔和圆珠笔共60支．卖掉12支圆珠笔后，钢笔和圆珠笔的支数同样多，请提出一个问题并解答．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">30 - 6</gadget>
<output>24</output>

<gadget id="calculator">12 + 24</gadget>
<output>36</output>

<result>36</result>