A pencil case is 5.8 yuan, and a pen is 3.5 yuan. How much does it cost to buy a pen and a pencil case?
一个文具盒5.8元，一支钢笔3.5元，买一支钢笔和一个文具盒一共需要多少钱？
<gadget id="calculator">5.8 + 3.5</gadget>
<output>9.3</output>

<result>9.3</result>