Xiao Ming bought 3 pens and 2 notebooks at the mall and spent a total of 35 yuan, and Xiao Jun bought 2 pens and 3 notebooks and spent a total of 25 yuan, so how much is 1 pen more expensive than 1 notebook?
小明到商场买3支钢笔和2个笔记本共花35元，小军买2支钢笔和3个笔记本共花25元，那么1支钢笔比1个笔记本贵多少元．
<gadget id="calculator">35 - 25</gadget>
<output>10</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">10 / 1</gadget>
<output>10</output>

<result>10</result>