Teacher Li went to the Stationery Wholesale Department to buy prizes. He bought 15 pens for 37.5 yuan and 12 pencils for 9.6 yuan. How much more expensive is each pen than each pencil?
李老师到文化用品批发部买奖品，买了15枝钢笔共用了37.5元，买了12枝铅笔共用了9.6元，每枝钢笔比每枝铅笔贵了多少元？
<gadget id="calculator">37.5 / 15</gadget>
<output>2.5</output>

<gadget id="calculator">9.6 / 12</gadget>
<output>0.8</output>

<gadget id="calculator">2.5 - 0.8</gadget>
<output>1.7</output>

<result>1.7</result>