There are 23 large cars in a parking lot, the number of vans is three times that of large cars, and the number of small cars is 18 less than the total number of large cars and vans. How many small cars are there?
一个停车场，有23辆大汽车，面包车的数量是大汽车的3倍，小汽车的数量比大汽车和面包车的总数少18辆，小汽车有多少辆？
<gadget id="calculator">23 * 3</gadget>
<output>69</output>

<gadget id="calculator">23 - 18</gadget>
<output>5</output>

<gadget id="calculator">69 + 5</gadget>
<output>74</output>

<result>74</result>