Xiao Ming took 40 yuan to the stationery store to buy school supplies. He first bought 6 notebooks for 28.8 yuan, and then he planned to use the remaining money to buy some homework books. Each homework book was 0.7 yuan. How many homework books can Xiao Ming buy?
小明带了40元钱去文具店买学习用品．他先花28.8元买了6个笔记本，然后准备用剩下的钱买一些作业本，每个作业本0.7元，小明还可以买几个作业本？
<gadget id="calculator">40 - 28.8</gadget>
<output>11.2</output>

<gadget id="calculator">11.2 / 0.7</gadget>
<output>16</output>

<result>16</result>