A fountain pen is 8.3 yuan, which is 5.7 yuan more expensive than a ballpoint pen. How much does it cost to buy each pen and ballpoint pen?
一只钢笔8.3元，比一支圆珠笔贵5.7元，钢笔圆珠笔各买一支一共要付多少元？
<gadget id="calculator">8.3 - 5.7</gadget>
<output>2.6</output>

<gadget id="calculator">2.6 + 8.3</gadget>
<output>10.9</output>

<result>10.9</result>