The distance between A and B is 408 kilometers. The bus and the truck depart from A and B at the same time and meet each other after 3 hours. It is known that the speed ratio of the bus and the truck is 9:8, and the bus is faster than the truck every hour. How many kilometers?
A，B两地相距408千米，客车和货车同时从A，B两地相对开出，3小时后相遇，已知客车和货车的速度比是9：8，客车每时比货车每时快多少千米？
<gadget id="calculator">408 / 3</gadget>
<output>136</output>

<gadget id="calculator">8 + 9</gadget>
<output>17</output>

<gadget id="calculator">9 / 17</gadget>
<output>9/17 = around 0.529412</output>

<gadget id="calculator">8 / 17</gadget>
<output>8/17 = around 0.470588</output>

<gadget id="calculator">(9/17) - (8/17)</gadget>
<output>1/17 = around 0.058824</output>

<gadget id="calculator">136 * (1/17)</gadget>
<output>8</output>

<result>8</result>