A product is priced at 1,200 yuan. After the shopkeeper sells it at a 15% discount, he still makes a profit of 360 yuan. What is the purchase price of the shopkeeper?
一件商品标价1200元，店主八五折卖出后，仍然赚了360元，店主的进价是多少元．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1_200 * (17/20)</gadget>
<output>1_020</output>

<gadget id="calculator">1_020 - 360</gadget>
<output>660</output>

<result>660</result>