Xiaoming bought 3 pencils, Xiaohong bought 7 pencils, and paid 1 yuan and 2 cents more than Xiaoming. How much is each pencil?
小明买了3枝铅笔，小红买了7枝铅笔，比小明多付1元2角，每枝铅笔多少角？
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">1.2 * (5/2)</gadget>
<output>3</output>

<result>3</result>