Taxi charges in a certain county are as follows: within 3 kilometers (including 3 kilometers), the fee is 8 yuan, and after 3 kilometers, the fee is increased by 2 yuan for every kilometer. Uncle Wang spent a total of 24 yuan by taxi from the supermarket. How far is it from his home to the supermarket?
某县的出租车这样收费：3千米以内(包括3千米)收费8元，超出3千米以后，每千米增收2元．王叔叔乘出租车从超市回家共花了24元，他家到超市有多远？
<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 + 3</gadget>
<output>11</output>

<result>11</result>