Xiaohong bought 3 writing books and 2 writing books. It cost 2.25 yuan to buy the composition and 0.96 yuan to buy the writing book. How much is each composition book more expensive than a writing book?
小红买了3本作文本和2本写字本．买作文本用了2.25元，买写字本用了0.96元．每本作文本比写字本贵多少元钱？
<gadget id="calculator">2.25 / 3</gadget>
<output>0.75</output>

<gadget id="calculator">0.96 / 2</gadget>
<output>0.48</output>

<gadget id="calculator">0.75 - 0.48</gadget>
<output>0.27</output>

<result>0.27</result>