Two cars drive from city A to city B at the same time. Car A travels 75 kilometers per hour, and car B travels 65 kilometers per hour. After a few hours, car A arrives at city B first, and car B is still far away from city B. 45 kilometers. How many miles is the distance between A and B?
两辆车同时从甲城开往乙城，A车每小时行驶75千米，B车每小时行驶65千米，几小时后，A车先到乙城，这时B车距乙城还有45千米．甲、乙两城相距多少千米？
<gadget id="calculator">75 - 65</gadget>
<output>10</output>

<gadget id="calculator">45 / 10</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">75 * (9/2)</gadget>
<output>675/2 = around 337.5</output>

<result>675/2 = around 337.5</result>