A train of freight trains and a train of passenger trains travel towards each other from places A and B at the same time. It takes 8 hours for the passenger trains to complete the journey. After 3 hours and 20 minutes, the distance between the two trains is still 120 kilometers. It is known that the speed ratio of the passenger car and the truck is 5:4, how many kilometers does the truck travel per hour?
一列货车与一列客车从甲乙两地同时相向而行，客车行完全程要8小时，开出后3小时20分两车还相距120千米．已知客车和货车速度的比是5：4，货车每小时行多少千米？
<gadget id="calculator">9 / 40</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">8 * (5/4)</gadget>
<output>10</output>

<gadget id="calculator">10 / 3</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(9/40) * (10/3)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 / (1/4)</gadget>
<output>480</output>

<gadget id="calculator">480 / 10</gadget>
<output>48</output>

<result>48</result>