A TV factory plans to produce a batch of color TV sets. The ratio of the number of color TV sets that have been produced to the number of color TV sets that have not been produced is 2:3. If 210 more sets are produced, it will exceed the plan (1/10). How many color TV sets were originally planned to be produced?
某电视机厂计划生产一批彩电，已生产的彩电与未生产的彩电台数的比为2：3，如果再生产210台，则超过计划的(1/10)．原计划生产彩电多少台？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/10) - (2/5)</gadget>
<output>-3/10 = around -0.3</output>

<gadget id="calculator">1 + (-3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">210 / (7/10)</gadget>
<output>300</output>

<result>300</result>