The science and technology lecture hall of a middle school has 20 rows upstairs and 30 rows downstairs, and each row has 32 seats. How many people can this lecture hall hold?
某中学的科技报告厅楼上有20排，楼下有30排，每排都有32个座位，这个报告厅能坐多少人？
<gadget id="calculator">20 + 30</gadget>
<output>50</output>

<gadget id="calculator">50 * 32</gadget>
<output>1_600</output>

<result>1_600</result>