The price of a basketball is 120 yuan, the price of a volleyball is less than that of a basketball (1/4), how much less is the price of a volleyball than a basketball?
一个篮球售价120元，排球的价格比篮球少(1/4)，排球的价格比篮球少多少钱？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 * (1/4)</gadget>
<output>30</output>

<result>30</result>