A car factory plans to produce 15,000 cars with a production line that can produce 120 cars per day. In fact, after 100 days of production, the technicians improved the production line, and the improved production line can produce 150 cars per day. How many more days will it take to complete this batch of production tasks?
某汽车制造厂计划用一条每天可生产120辆汽车的生产线生产15000辆汽车．实际在生产了100天以后，技术人员对这条生产线进行了改进，改进后的这条生产线每天可生产汽车150辆．这样再用多少天就可以完成这批生产任务？
<gadget id="calculator">120 * 100</gadget>
<output>12_000</output>

<gadget id="calculator">15_000 - 12_000</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 / 150</gadget>
<output>20</output>

<result>20</result>