A train of passenger cars and a train of freight trains start from two places A and B which are 270 kilometers apart at the same time. After 3 hours, the two cars meet. The speed ratio of the passenger car and the freight car is 5:4. How many kilometers does the passenger car travel per hour?
一列客车和一列货车同时从相距270千米的甲、乙两地相向开出，3小时后两车之间相遇，客车和货车的速度比是5：4，客车每小时行多少千米？
<gadget id="calculator">270 / 3</gadget>
<output>90</output>

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

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">90 * (5/9)</gadget>
<output>50</output>

<result>50</result>