The distance between the two places is 1140 kilometers. Cars A and B start from the two places at the same time and drive toward each other. After 5 hours, the two cars meet. It is known that the speed of car A is the speed of car B (9/10), and the speed of car B is How many kilometers per hour?
两地相距1140千米，甲乙两车从两地同时出发，相向而行，经过5小时两车相遇，已知甲车的速度是乙车速度的(9/10)，乙车的速度是每小时多少千米？
<gadget id="calculator">9 + 10</gadget>
<output>19</output>

<gadget id="calculator">1_140 / 5 / 19</gadget>
<output>12</output>

<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<result>120</result>