Xiaohong bought 4 pencils and 4 workbooks. Each workbook is 6 cents, and the total cost is 3.6 yuan. What is the unit price of the pencil? (solution with equation)
小红买了4只铅笔和4个作业本，每个作业本6角，共用去3.6元，求铅笔的单价？(用方程解答)
<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">36 - 24</gadget>
<output>12</output>

<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<result>3</result>