batch of color TVs in the home appliance mall were on sale during the "May 1st" Labor Day period. The price of each set was 2,100 yuan, which was 30% lower than the original price. It was originally planned that the ratio of the sales volume between the first day and the second day was 5:3, but actually 54 units were sold on the first day, 20% more than the original planned sales volume. A total profit of 21,600 yuan was made in two days. How many color TVs did the home appliance mall originally plan to sell on the first day?
家电商城有一批彩电在"五一"劳动节期间促销，每台售价2100元，比原价降低了30%．原计划第一天和第二天的销售量的比是5：3，实际第一天就销售了54台，比原计划的销售量多20%．两天共盈利21600元．家电商城原计划第一天销售多少台彩电？
<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">54 / (6/5)</gadget>
<output>45</output>

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

<gadget id="calculator">45 * (3/5)</gadget>
<output>27</output>

<result>27</result>