A garment factory plans to process 4,000 sets of garments, but actually completes 70% of the plan in half a month and 60% of the plan in the second half of the month. How many more sets are actually produced this month than planned?
某服装厂计划加工4000套服装，实际上半月完成计划的70%，下半月完成计划的60%．这个月实际比计划多生产多少套？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

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

<gadget id="calculator">(7/10) + (3/5)</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">4_000 * (13/10)</gadget>
<output>5_200</output>

<gadget id="calculator">5_200 - 4_000</gadget>
<output>1_200</output>

<result>1_200</result>