Two cars A and B drive from a place in opposite directions at the same time, and the distance between them is 510 kilometers after 5 hours. Given that the speed ratio of cars A and B is 8:9, how many kilometers does car A travel per hour?
甲、乙两辆汽车同时从一个地方向相反的方向开出，5小时后相距510千米．已知甲、乙两车的速度比是8：9，求甲车每小时行多少千米？
<gadget id="calculator">510 / 5</gadget>
<output>102</output>

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

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

<gadget id="calculator">102 * (8/17)</gadget>
<output>48</output>

<result>48</result>