The young pioneers visited the photo exhibition of creating a civilized city. On the first day, 120 people went, on the second day, 30 people went 1.5 times less than the first day, and on the third day, half the number of the second day went. How many people went there?
少先队员参观创建文明城市图片展，第一天去了120人，第二天去的比第一天的1.5倍少30人，第三天去的是第二天的人数的一半，第三条去了多少人？
<gadget id="calculator">120 * 1.5</gadget>
<output>180</output>

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

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

<result>75</result>