A certain auto repair factory has three workshops, the first workshop has 150 people, the second workshop has 12 more people than the first workshop, and the third workshop has half the number of people in the first workshop. How many people are there on average in each workshop?
某汽修厂有三个车间，第一车间有150人，第二车间比第一车间多12人，第三车间的人数是第一车间的一半．平均每个车间有多少人？
<gadget id="calculator">150 + 12</gadget>
<output>162</output>

<gadget id="calculator">150 / 2</gadget>
<output>75</output>

<gadget id="calculator">150 + 162 + 75</gadget>
<output>387</output>

<gadget id="calculator">387 / 3</gadget>
<output>129</output>

<result>129</result>