Master Wang has to complete the processing task of 360 machine parts. The original plan is to process 60 per hour, but the actual processing is 30 more per hour. In this way, Master Wang can complete the task a few hours earlier than the original plan?
王师傅要完成360个机器零件的加工任务，原计划每小时加工60个，实际每小时多加工30个，这样王师傅可以比原计划提前几小时完成任务？
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

<gadget id="calculator">60 + 30</gadget>
<output>90</output>

<gadget id="calculator">360 / 90</gadget>
<output>4</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<result>2</result>