A movie theater has 38 rows of seats, and each row has 28 seats. After the expansion, the number of rows remains the same, and each row increases to 42 seats. How many seats are added in total?
一个电影院有38排座位，每排28个座位，扩建后排数不变，每排增加到42个座位，一共增加了多少个座位？
<gadget id="calculator">42 - 28</gadget>
<output>14</output>

<gadget id="calculator">14 * 38</gadget>
<output>532</output>

<result>532</result>