The charging method of a taxi in a certain place is as follows: when the travel distance does not exceed 3 kilometers, the fare is 4 yuan (starting price); A passenger travels 18 kilometers from home to the gymnasium. How much does it cost him to take the bus?
某地出租车收费方法如下：乘车路程不超过3千米时，收费4元(起步价)；超过3千米时，超过部分按每千米1.2元加收车费．某乘客从家里去体育馆有18千米，他乘车的费用是多少元？
<gadget id="calculator">18 - 3</gadget>
<output>15</output>

<gadget id="calculator">15 * 1.2</gadget>
<output>18</output>

<gadget id="calculator">18 + 4</gadget>
<output>22</output>

<result>22</result>