A train has 9 sleeper cars and 9 hard seat cars. Each sleeper car can accommodate 78 people, and each hard seat car can accommodate 122 people. How many passengers can this train carry in total?
一列火车有9节卧铺车厢和9节硬座车厢，每节卧铺车厢可容纳78人，每节硬座车厢可容纳122人，这列火车一共可以载客多少人？
<gadget id="calculator">78 * 9</gadget>
<output>702</output>

<gadget id="calculator">122 * 9</gadget>
<output>1_098</output>

<gadget id="calculator">702 + 1_098</gadget>
<output>1_800</output>

<result>1_800</result>