Sun Ming bought 4 pencils, paid the salesperson 10 yuan, got back 6.8 yuan, how much is each pencil?
孙明买了4支铅笔，付给售货员10元钱，找回6.8元，每支铅笔多少钱？
<gadget id="calculator">10 - 6.8</gadget>
<output>3.2</output>

<gadget id="calculator">3.2 / 4</gadget>
<output>0.8</output>

<result>0.8</result>