Master Wang makes a batch of parts, and plans to make 150 parts per hour, which will be completed in 6 hours. Actually do 30 more per hour than planned, how many hours can the task be completed?
王师傅做一批零件，计划每小时做150个，6小时做完．实际每小时比计划多做30个，实际几小时可以完成任务？
<gadget id="calculator">150 * 6</gadget>
<output>900</output>

<gadget id="calculator">150 + 30</gadget>
<output>180</output>

<gadget id="calculator">900 / 180</gadget>
<output>5</output>

<result>5</result>