Two cars drive towards each other at the same time from two cities 180 kilometers apart. Car A travels 40 kilometers per hour, and car B travels 50% more than car A per hour. After 1.5 hours, how many kilometers are the distance between the two cars?
两辆汽车同时从相距180千米的两个城市相向开出，甲车每小时行40千米，乙车每小时比甲车每小时多行50%．1.5小时后，两车相距多少千米？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 * (1/2)</gadget>
<output>20</output>

<gadget id="calculator">40 + 20</gadget>
<output>60</output>

<gadget id="calculator">40 + 60</gadget>
<output>100</output>

<gadget id="calculator">100 * 1.5</gadget>
<output>150</output>

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

<result>30</result>