Renren Shopping Mall went to Hainan Island to buy mangosteen at a price of 2.7 yuan per kilogram. The distance from Hainan Island to the shopping mall is 600 kilometers, and the shipping fee is 3 yuan per ton of goods per 1 kilometer. If the loss in the transportation and sales process is 10%, then if the shopping mall wants to realize 20% profit, how much should the retail price of mangosteen per kilogram be set?
人人商场到海南岛去收购山竹，收购价为每千克2.7元．从海南岛到商场的距离是600千米，运费为每吨货物每运1千米收3元．如果在运输及销售过程中的损耗是10%，那么商场要想实现20%的利润，每千克山竹的零售价应定为多少元？
<gadget id="calculator">2.7 * 1_000</gadget>
<output>2_700</output>

<gadget id="calculator">3 * 600</gadget>
<output>1_800</output>

<gadget id="calculator">2_700 + 1_800</gadget>
<output>4_500</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">4_500 * (6/5)</gadget>
<output>5_400</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1_000 * (9/10)</gadget>
<output>900</output>

<gadget id="calculator">5_400 / 900</gadget>
<output>6</output>

<result>6</result>