Taxi charges in a certain city are as follows: when the travel distance does not exceed 3 kilometers, the fare is 4 yuan (starting price); when the distance is more than 3 kilometers, an additional fare of 1.6 yuan per kilometer is charged for the excess part. Uncle Wang pays 23.2 yuan for a ride. How many kilometers does he travel by car?
某市出租车收费规定如下：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1.6元加收车费．王叔叔一次乘车付车费23.2元，他乘车的路程是多少千米？
<gadget id="calculator">23.2 - 4</gadget>
<output>19.2</output>

<gadget id="calculator">19.2 / 1.6</gadget>
<output>12</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<result>15</result>