Pencils cost 3 cents each, and gel pens cost 9 cents. What fraction of the unit price of a pencil is that of a gel pen? (Express the quotient with the simplest fraction)
铅笔每支3角，中性笔每支9角，铅笔的单价是中性笔的几分之几？(用最简分数表示商)
<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>