Aunt Xiaoli took 240 yuan to the supermarket. With this money, you can buy 20 notebooks of some kind, or you can buy 16 pens with the same unit price. Who is the most expensive notebook and pen? How much is the most expensive unit price?
小丽阿姨带了240元钱去超市．这些钱可以买20本某种笔记本，也可以买16枝同样单价的钢笔．笔记本和钢笔的单价谁贵？最贵的单价是多少元？
<gadget id="calculator">240 / 16</gadget>
<output>15</output>

<result>15</result>