The garment factory produces a batch of children's clothing. The original plan is to produce 3,000 sets per day, and the task will be completed in 70 days. The actual daily production is 500 sets more than the original plan, and how many days are actually used to complete the task?
服装厂生产一批童装，原计划每天生产3000套，70天完成任务．实际每天比原计划多生产500套，实际用多少天完成任务？
<gadget id="calculator">3_000 + 500</gadget>
<output>3_500</output>

<gadget id="calculator">70 / 3_500</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">3_000 * (1/50)</gadget>
<output>60</output>

<result>60</result>