Xiao Ming bought 4 pens, paid the salesperson 30 yuan, and got back 1.2 yuan. How much is each pen on average?
小明买了4枝钢笔，付给营业员30元，找回1.2元，平均每枝钢笔多少元？
<gadget id="calculator">30 - 1.2</gadget>
<output>28.8</output>

<gadget id="calculator">28.8 / 4</gadget>
<output>7.2</output>

<result>7.2</result>