Regulations in front of the playground: Parking a car, you need to pay 3 yuan for the first hour, and 2 yuan per hour thereafter. The father takes his son to drive the car to the playground to play, and pays a total parking fee of 13 yuan. The father and son are in the playground How many hours did you play?
游乐场门前规定：停放小汽车，第一小时需付3元，以后每小时付2元，爸爸带着儿子开着小汽车到游乐场玩，共付停车费13元，父子俩在游乐场玩了多少小时？
<gadget id="calculator">13 - 3</gadget>
<output>10</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>