A and B each plan to produce a batch of parts in January. In fact, A overfulfilled 40% of the plan, and B produced 480 more parts than planned. The two produced 1200 more parts than planned. A actually produced this month. How many parts did you have?
甲、乙两人各计划1月份生产一批零件，实际甲超额完成计划的40%，乙生产的零件数量比计划多生产480个，两人一共比计划多生产1200个，甲这个月实际生产了多少个零件？
<gadget id="calculator">1_200 - 480</gadget>
<output>720</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">720 / (2/5)</gadget>
<output>1_800</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">1_800 * (7/5)</gadget>
<output>2_520</output>

<result>2_520</result>