Teacher Li brought 206 yuan to buy ink cartridges and pens, 16 bottles of ink, and 18 pens. Ink 5 yuan per bottle. How much is each pen?
李老师带了206元购买墨水盒钢笔，墨水16瓶，钢笔18枝．其中墨水每瓶5元．钢笔每枝多少元？
<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<gadget id="calculator">206 - 80</gadget>
<output>126</output>

<gadget id="calculator">126 / 18</gadget>
<output>7</output>

<result>7</result>