passenger car and a truck leave opposite to each other from A and B at the same time. The bus travels 55 kilometers per hour, and the truck travels 45 kilometers per hour. After 4 (1/2) hours, the two vehicles meet. What is the distance between A and B? rice?
一辆客车与一辆货车同时从甲乙两城相对开出，客车每小时行55千米，货车每小时行45千米，经过4(1/2)小时两车相遇，甲乙两城相距多少千米？
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">100 * (7/2)</gadget>
<output>350</output>

<result>350</result>