A commodity is now 120 yuan per piece, which is 20% lower than the original price. What is the original price of this commodity?
一种商品现在每件120元，比原价降低了20%，这种商品的原价是多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">120 / (4/5)</gadget>
<output>150</output>

<result>150</result>