Dad bought a suit, and the price after the 25% discount was 120 yuan cheaper than the original price. How much is the original price of this suit?
爸爸买了一件西装，打七五折后的价钱比原价便宜了120元．这套西服的原价是多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 / (1/4)</gadget>
<output>480</output>

<result>480</result>