It costs 4.8 yuan to buy a pen, and the price to buy 4 pencils is 1/3 of the price to buy a pen. How much is it to buy a pencil?
买一支钢笔要4.8元，买4支铅笔的钱是买一支钢笔的钱的(1/3)，买一支铅笔要多少元？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) / 4</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">4.8 * (1/12)</gadget>
<output>0.4</output>

<result>0.4</result>