A set of clothing is first increased by 50% according to the purchase price, and then discounted by 20%. Now it sells for 480 yuan. What is the purchase price of this set of clothing?
一套服装先按进价提高50%，后打八折，现在卖480元，这套服装进价多少．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">480 / (3/2) / (4/5)</gadget>
<output>400</output>

<result>400</result>