A commodity is now priced at 120 yuan, which is 1/4 lower than the original price. How much is this commodity reduced?
一种商品现在售价120元，比原价降低了(1/4)，这种商品降低了多少元？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">120 / (3/4)</gadget>
<output>160</output>

<gadget id="calculator">160 - 120</gadget>
<output>40</output>

<result>40</result>