Uncle Li processes a batch of parts, plans to process 50 per hour, and completes in 6 hours. The actual work efficiency has increased by 20%, how many hours can the task be completed?
李叔叔加工一批零件，计划每小时加工50个，6小时完成．实际工作效率提高了20%，实际多少小时就可以完成任务？
<gadget id="calculator">50 * 6</gadget>
<output>300</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">50 * (6/5)</gadget>
<output>60</output>

<gadget id="calculator">300 / 60</gadget>
<output>5</output>

<result>5</result>