Master Wang plans to process 3 parts per day, and the task can be completed in 8 days. In fact, one more part is processed per day. How many days can the task be completed?
王师傅计划每天加工3个零件，8天可以完成任务，实际每天多加工1个，几天可以完成任务？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>