If one kind of square brick is used to pave the floor, 80 bricks are needed for a 20-square-meter meeting room, and how many bricks are needed for a 50-square-meter meeting room?
用一种方砖铺地，20平方米的会议室需要80块，50平方米的会议室需要多少块？
<gadget id="calculator">20 / 80</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">50 / (1/4)</gadget>
<output>200</output>

<result>200</result>