Parking in the park parking lot, a total of 3 yuan is required for the first two hours, and 2 yuan per hour thereafter. Uncle Wang stopped for 4 hours, how much should he pay
在公园停车场停车，前两小时共需付款3元，以后每小时2元．王叔叔停了4小时，他应该付款多少元
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<result>7</result>