Xiaoming’s house needs to use square bricks to pave a square room with a side length of 7 meters. There are 12 square bricks per square meter. How many square bricks are used in this room?
小明家要用方砖铺一个边长是7米的正方形房间，每平方米要用12块方砖，这个房间要用方砖多少块？
<gadget id="calculator">7 * 7 * 12</gadget>
<output>588</output>

<result>588</result>