6 pencils and 1 pencil case total 15.8 yuan, and each pencil case is 12.8 yuan. How much is each pencil?
6支铅笔和1个铅笔盒共15.8元，铅笔盒每个12.8元．铅笔每支多少元？
<gadget id="calculator">15.8 - 12.8</gadget>
<output>3</output>

<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>