factory plans to produce 585 color TV sets in June, but the actual daily output is 2/13 higher than the original plan. According to this calculation, can the production plan be completed a few days earlier? (Based on 30 days)
某厂计划6月份生产彩电585台，实际每天产量比原计划增加(2/13)，照这样计算，可以提早少天完成生产计划？(按30天计算)
<gadget id="calculator">585 / 30</gadget>
<output>39/2 = around 19.5</output>

<gadget id="calculator">2 / 13</gadget>
<output>2/13 = around 0.153846</output>

<gadget id="calculator">1 + (2/13)</gadget>
<output>15/13 = around 1.153846</output>

<gadget id="calculator">(39/2) * (15/13)</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">585 / (45/2)</gadget>
<output>26</output>

<gadget id="calculator">30 - 26</gadget>
<output>4</output>

<result>4</result>