A workshop plans to produce a batch of parts in 20 days, but actually produces 50 more per day and completes it 2 days ahead of schedule. How many parts are in this batch?
某车间计划20天生产一批零件，实际每天多生产50个，提前2天完成，这批零件多少个．
<gadget id="calculator">60 * 20</gadget>
<output>1_200</output>

<result>1_200</result>