The distance between places A and B is 450 kilometers, and two cars from A to B go from A to B at the same time. Car A travels 50 kilometers per hour, and car B travels 45 kilometers per hour. After car A arrives at point B, how many kilometers away will car B be from point B?
A、B两地相距450千米，甲乙两车同时从A地到B地．甲车每小时行50千米，乙车每小时行45千米，甲车到B地后，乙车离B地还有多少千米？
<gadget id="calculator">450 / 50</gadget>
<output>9</output>

<gadget id="calculator">9 * 45</gadget>
<output>405</output>

<gadget id="calculator">450 - 405</gadget>
<output>45</output>

<result>45</result>