The distance between places A and B is 320 kilometers. Cars A and B drive toward each other from places A and B at the same time, and they meet after 2 hours. It is known that the speed of car A is that of car B (7/9), how many kilometers does car A travel per hour?
A，B两地相距320千米，甲、乙两车分别从A，B两地同时相向而行，2小时后相遇．已知甲车的速度是乙车的(7/9)，甲车每小时行驶多少千米？
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">1 + (7/9)</gadget>
<output>16/9 = around 1.777778</output>

<gadget id="calculator">320 / 2 / (16/9)</gadget>
<output>90</output>

<gadget id="calculator">90 * (7/9)</gadget>
<output>70</output>

<result>70</result>