A taxi in a certain city is billed like this: 8 yuan within 3 kilometers, and 2 yuan per kilometer thereafter. Uncle Wang sat for 5 kilometers, how much should he pay for the fare?
某城市出租车这样计费：3千米以内8元钱，以后每千米2元钱．王大伯坐了5千米，应给多少元车费？
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 8</gadget>
<output>12</output>

<result>12</result>