workshop completes the processing task of a batch of parts in three days. 400 parts are processed on the first day, and the remaining 40% are processed on the second day. At this time, there are still 480 parts missing. How many parts are there in total?
某车间三天完成一批零件的加工任务．第一天加工400个，第二天加工余下的40%，这时还差480个没加，这批零件共多少个？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">480 / (3/5)</gadget>
<output>800</output>

<gadget id="calculator">800 + 400</gadget>
<output>1_200</output>

<result>1_200</result>