Chunguang TV Factory planned to produce 1,650 TV sets in October, but actually produced 50% of the plan in the first half of the month, and 60% of the plan in the second half of the month. How many units did Chunguang TV Factory overproduce in October?
春光电视机厂计划十月份生产电视机1650台，实际上半月生产了计划的50%，下半月生产了计划的60%．春光电视机厂十月份超产多少台？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) - 1</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">(1/2) + (-2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1_650 * (1/10)</gadget>
<output>165</output>

<result>165</result>