The students lined up to get on the bus. There were 5 people in front of Li Ping and 4 people in the back. How many people are there in line?
同学们排队上车，李平的前面有5人，后面有4人．排队的一共有多少人？
<gadget id="calculator">5 + 4 + 1</gadget>
<output>10</output>

<result>10</result>