Guangming Cinema has two floors, the upper floor has 15 rows with 40 seats in each row, and the lower floor has 25 rows with 40 seats in each row. How many seats does this movie theater have?
光明电影院有上下两层，上层有15排，每排40个座位，下层有25排，每排40个座位，这家电影院一共有多少个座位？
<gadget id="calculator">15 * 40</gadget>
<output>600</output>

<gadget id="calculator">25 * 40</gadget>
<output>1_000</output>

<gadget id="calculator">600 + 1_000</gadget>
<output>1_600</output>

<result>1_600</result>