Teacher Sun wants to use 80 yuan to buy some stationery as a prize for the grade sports meeting. He first bought 8 photo albums for 45.6 yuan, and plans to use the rest of the money to buy some pens. Each pen is 4.3 yuan. Teacher Sun can buy a few more pen?
孙老师要用80元买一些文具作为年级运动会的奖品，他先花45.6元买了8本相册，并准备用剩下的钱买一些钢笔，每枝钢笔4.3元，孙老师还可以买几枝钢笔？
<gadget id="calculator">80 - 45.6</gadget>
<output>34.4</output>

<gadget id="calculator">34.4 / 4.3</gadget>
<output>8</output>

<result>8</result>