Each box of watercolor pens is 13 yuan, each drawing paper is 4 yuan, and each drawing board is 23 yuan. The money Mr. Zhang brought is just enough to buy 9 boxes of watercolor pens and 1 drawing board. If you buy drawing paper with this money, how many sheets can you buy?
每盒水彩笔13元，每张绘画纸4元，每块画板23元．张老师带的钱正好可以买9盒水彩笔和1块画板．这些钱如果买绘画纸，可以买多少张？
<gadget id="calculator">13 * 9</gadget>
<output>117</output>

<gadget id="calculator">117 + 23</gadget>
<output>140</output>

<gadget id="calculator">140 / 4</gadget>
<output>35</output>

<result>35</result>