Xiaoxiao went to Beijing for a spring outing. He took a taxi from Deshengmen to the zoo alone. The starting price was 10 yuan (within 3 kilometers, including 3 kilometers), and 2 yuan was added for every 1,000 meters over 3 kilometers. It is 4000 meters from Deshengmen to the zoo. How much should she pay for the ride to the zoo?
笑笑去北京春游，他一个人坐出租车从德胜门去动物园，起步价10元(3千米以内，含3千米)，超过3干米每增加1000米加2元．从德胜门到动物园有4000米．到动物园时，她该付车费多少元？
<gadget id="calculator">10 + 2</gadget>
<output>12</output>

<result>12</result>