Master Wang originally planned to produce 28 toy cars per day, which took 15 days to complete. The actual production of 2 more toy cars per day than the original plan, the actual number of days to complete the task?
王师傅原计划每天生产28辆玩具车，15天完成．实际每天比原计划多生产2辆玩具车，实际几天完成任务？
<gadget id="calculator">28 * 15</gadget>
<output>420</output>

<gadget id="calculator">28 + 2</gadget>
<output>30</output>

<gadget id="calculator">420 / 30</gadget>
<output>14</output>

<result>14</result>