Xiaoli bought 2 pens and 5 pencil cases in a stationery store, and the total cost was 71.5 yuan. Knowing that a pen is 5.75 yuan, how much is a pencil case? (Solution of column equation)
小力在文具店买了2支钢笔和5个文具盒，共用去71.5元，已知一支钢笔5.75元，求一个文具盒多少元？(列方程解)
<gadget id="calculator">5.75 * 2</gadget>
<output>11.5</output>

<gadget id="calculator">71.5 - 11.5</gadget>
<output>60</output>

<gadget id="calculator">60 / 5</gadget>
<output>12</output>

<result>12</result>