If the purchase price of a piece of clothing is 150 yuan, and you can still earn 30 yuan if you sell it at 40% off the selling price, what is the selling price?
一件衣服进价150元，按售价的六折售出仍赚30元，则售价为多少元．
<gadget id="calculator">150 + 30</gadget>
<output>180</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">180 / (3/5)</gadget>
<output>300</output>

<result>300</result>