Cars A and B leave opposite directions at the same time from places A and B. After 2.5 hours, the two cars meet on the way. It is known that the speed of car A is 90 km/h and the speed of car B is 72 km/h. How many miles is the distance between A and B?
甲、乙两车同时从A、B两地相向开出，经过2.5小时后两车在途中相遇．已知甲车的速度是90千米/时，乙车的速度是72千米/时．A、B两地之间相距多少千米？
<gadget id="calculator">90 + 72</gadget>
<output>162</output>

<gadget id="calculator">162 * 2.5</gadget>
<output>405</output>

<result>405</result>