Each car has 108 hard seats, and there are 12 hard seat cars in total. There are 308 hard-seat tickets that have not been sold. How many hard-seat train tickets were sold on this train?
每节车厢有108个硬座，共有12节硬座车厢．还有308张硬座车票没卖出．这列火车一共卖出了多少张硬座的火车票？
<gadget id="calculator">108 * 12</gadget>
<output>1_296</output>

<gadget id="calculator">1_296 - 308</gadget>
<output>988</output>

<result>988</result>