The school buys 2 pencil cases and 8 pencils, and the shared cost is 7.7 yuan. Among them, each pencil is 0.2 yuan, how much is each stationery box?
学校买2个文具盒和8支铅笔，共用去7.7元．其中铅笔每支0.2元，每个文具盒多少元？
<gadget id="calculator">8 * 0.2</gadget>
<output>1.6</output>

<gadget id="calculator">7.7 - 1.6</gadget>
<output>6.1</output>

<gadget id="calculator">6.1 / 2</gadget>
<output>3.05</output>

<result>3.05</result>