A car travels from A to B at 54 kilometers per hour, and returns at 45 kilometers per hour. It takes 11 hours to go back and forth. How many kilometers is the total length from A to B?
一辆汽车从甲地去乙地，每小时行54千米，返回每小时行45千米，往返共用去11小时，甲地到乙地全长多少千米？
<gadget id="calculator">45 * 11</gadget>
<output>495</output>

<gadget id="calculator">54 + 45</gadget>
<output>99</output>

<gadget id="calculator">495 / 99</gadget>
<output>5</output>

<gadget id="calculator">54 * 5</gadget>
<output>270</output>

<result>270</result>