There are 84 workers on the first production line of a garment factory, and 66 workers on the second production line. According to production needs, the number of people on the second line is twice that of the first. How should the two lines be adjusted? Number of people on board?
服装厂第一条生产流水线上有工人84人，第二条生产流水线上有工人66人，根据生产需要，要使第二条流水线的人数是第一条的2倍，应该怎样调整两条流水线上的人数？
<gadget id="calculator">84 + 66</gadget>
<output>150</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<gadget id="calculator">84 - 50</gadget>
<output>34</output>

<result>34</result>