Congcong brought 50 yuan to buy stationery, 26 yuan to buy a diary and a fountain pen, and the rest of the money to buy carbon pens, each carbon pen is 4 yuan, how many can you buy? What is the column
聪聪带50元钱买文具，买日记本和钢笔花了26元，剩下的钱要买碳素笔，每支碳素笔4元，可以买几支？列式为多少
<gadget id="calculator">50 - 26</gadget>
<output>24</output>

<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<result>6</result>