garment factory planned to produce 255 sets of garments per day, and completed the task in 108 days. After improving the technology, it actually completed the task in 90 days. How many sets were actually produced per day than planned?
某服装厂计划每天生产255套服装，108天完成任务，改进技术后，实际90天完成了任务，实际每天比计划多生产多少套？
<gadget id="calculator">108 / 90</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">255 * (6/5)</gadget>
<output>306</output>

<gadget id="calculator">306 - 255</gadget>
<output>51</output>

<result>51</result>