There are 15 rows of seats on the upper floor of the children's theater, with 22 seats in each row; there are 720 seats downstairs. How many seats are there in this theater?
儿童剧场楼上有15排座位，每排22个；楼下共有720个座位．这个剧场的座位一共有多少个．
<gadget id="calculator">15 * 22</gadget>
<output>330</output>

<gadget id="calculator">330 + 720</gadget>
<output>1_050</output>

<result>1_050</result>