The color TV production center planned to produce 1,200 color TV sets in April, and 40% of the plan was completed in 10 days. How many days will it take to complete the planned task?
彩电生产中心四月份计划生产彩电1200台，10天完成了计划的40%，完成计划任务还需要多少天？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/5) / 10</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(3/5) / (1/25)</gadget>
<output>15</output>

<result>15</result>