A shopping mall held a promotion to welcome the New Year. LCD TVs with an original price of 4,000 yuan were sold at a 15% discount. What is the price of the LCD TV during the promotion period?
某商场举办迎新年促销活动，原价4000元的液晶电视八五折销售，促销期间液晶电视的价格是多少元．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">4_000 * (17/20)</gadget>
<output>3_400</output>

<result>3_400</result>