To build the Tianjin-Qin high-speed railway, 100 road construction workers completed it in 360 days. If the work efficiency of each road construction worker remains the same, and the construction is to be completed 60 days ahead of schedule, how many additional workers must be added to complete the task? (Answer with proportional knowledge)
修建津秦高速铁路，100个筑路工人360天完成．如果每个筑路工人的工作效率不变，要提前60天完工，必须增加多少个工人才可以完成任务？(用比例知识解答)
<gadget id="calculator">360 * 100</gadget>
<output>36_000</output>

<gadget id="calculator">360 - 60</gadget>
<output>300</output>

<gadget id="calculator">36_000 / 300</gadget>
<output>120</output>

<result>120</result>