A conference room in the school is paved with square floor tiles with a side length of 0.5 meters, which is just covered with 320 tiles. How many square meters is the conference room?
学校的一会议室铺边长0.5米的正方形地砖，用320块刚好铺满，这个会议室面积多少平方米？
<gadget id="calculator">0.5 * 0.5 * 320</gadget>
<output>80</output>

<result>80</result>