The factory originally planned to produce 10,000 parts in 20 days. After 2 days of production, it can produce 100 more parts per day than before due to improved production technology. So, how many days will it take to complete the production task?
工厂原计划20天生产10000个零件，在生产2天后由于改进了生产技术每天可以比原来多生产100个，那么，还需要几天才能完成生产任务？
<gadget id="calculator">10_000 / 20</gadget>
<output>500</output>

<gadget id="calculator">500 * 2</gadget>
<output>1_000</output>

<gadget id="calculator">10_000 - 1_000</gadget>
<output>9_000</output>

<gadget id="calculator">500 + 100</gadget>
<output>600</output>

<gadget id="calculator">9_000 / 600</gadget>
<output>15</output>

<result>15</result>