Two cars, A and B, leave from A and B oppositely at the same time. It is known that car A travels 45 kilometers per hour, and car B travels 50 kilometers per hour. After 3 hours, the distance between the two cars is 90 kilometers. Find the distance between A and B in kilometers?
甲乙两车同时从A、B两地相对开出，已知甲车每小时行驶45千米，乙车每小时行驶50千米，3小时后两车相距90千米．求A、B两地相距多少千米？
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<gadget id="calculator">135 + 150 + 90</gadget>
<output>375</output>

<result>375</result>