Xiao Zhang and Xiao Liu rent a car together to go to the Cultural Palace. The starting price is 5 yuan, and the trip is 4 kilometers. The excess part is calculated at 0.8 yuan per kilometer. They are 9 kilometers away from the Cultural Palace. How much should each of them pay on average?
小张、小刘合租一辆汽车去文化宫，5元起价，行4千米，超过部分按每千米0.8元计算．他们离文化宫9千米．他们平均每人应给多少元？
<gadget id="calculator">9 - 4</gadget>
<output>5</output>

<gadget id="calculator">5 * 0.8</gadget>
<output>4</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>