The Agricultural Machinery Factory plans to produce a batch of harvesters. It originally planned to produce 200 harvesters per day, and it took 25 days to complete. In fact, 1,000 harvesters were produced in the first four days. According to this calculation, how many days can the task be completed?
农机厂计划生产一批收割机，原计划每天生产200台，25天完成，实际前四天生产了1000台，照这样计算，几天可以完成任务？
<gadget id="calculator">1_000 / 4</gadget>
<output>250</output>

<gadget id="calculator">25 / 250</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">200 * (1/10)</gadget>
<output>20</output>

<result>20</result>