There are 30 three-wheeled motorcycles, four-wheeled cars and six-wheeled trucks in a certain parking lot, with a total of 116 wheels of various types. It is known that four-wheeled sedans are five times more than six-wheeled trucks, so how many cars are there in this parking lot?
某停车场中共有三轮摩托车，四轮小轿车和六轮大卡车30辆，各种轮子共116个．已知四轮小轿比六轮大卡车的5倍多2辆，那么这个停车场中共有多少辆小轿车．
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">15 + 2</gadget>
<output>17</output>

<result>17</result>