Xiaojun and Xiaohao originally spent the same amount of money to buy several pencils of the same kind. Later, Xiaojun took 13 pencils, Hao took 7, and Xiaojun gave Xiaohao 30 cents. How much is each pencil?
小军和小浩原来拿出相同的钱买来相等数目的同种铅笔若干支，后来小军拿了13支，浩拿了7支，而小军给了小浩3角钱．问每支铅笔是多少钱？
<gadget id="calculator">13 + 7</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">13 - 10</gadget>
<output>3</output>

<gadget id="calculator">0.3 / 3</gadget>
<output>0.1</output>

<result>0.1</result>