An auditorium is 18 meters long and 8.5 meters wide, and the floor is paved with floor tiles with an area of 0.5 square meters. How many such floor tiles are needed?
一间礼堂长18米，宽8.5米，用面积为0.5平方米的地砖铺地面，需要这种地砖多少块？
<gadget id="calculator">8.5 / 0.5</gadget>
<output>17</output>

<gadget id="calculator">18 * 17</gadget>
<output>306</output>

<result>306</result>